GET /kore/v1/principal/?format=api&offset=40
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "count": 396,
    "next": "https://api.hel.fi/kore/v1/principal/?format=api&limit=20&offset=60",
    "previous": "https://api.hel.fi/kore/v1/principal/?format=api&limit=20&offset=20",
    "results": [
        {
            "url": "https://api.hel.fi/kore/v1/principal/1799/?format=api",
            "id": 1799,
            "surname": "Achté",
            "first_name": "Lorenz Nikolai",
            "employers": [
                {
                    "id": 2282,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/717/?format=api",
                        "id": 717,
                        "names": [
                            {
                                "id": 1148,
                                "official_name": "Helsingfors Klockare och orgelnistskola",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": 9,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1922,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 665,
                                "language": "ruotsi",
                                "begin_year": 1882,
                                "end_year": 1922,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 1103,
                                "type": {
                                    "id": 17,
                                    "name": "ammattikoulu",
                                    "description": "Käytännölliseen ammattiin valmistava koulu. Ammattikoulut yleistyivät 1800-luvun lopulla, koulut olivat usein pieniä ja toimivat vain lyhyen aikaa. Peruskoulu-uudistuksen myötä ammattikouluja on yhdistetty suuriksi oppilaitoksiksi."
                                },
                                "begin_day": null,
                                "begin_month": 9,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1922,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 717
                            }
                        ],
                        "fields": [
                            {
                                "id": 4,
                                "field": {
                                    "id": 9,
                                    "name": "Kulttuuriala"
                                },
                                "begin_day": null,
                                "begin_month": 9,
                                "begin_year": 1882,
                                "approx_begin": false,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1922,
                                "approx_end": true,
                                "reference": null,
                                "main_school": 717
                            }
                        ],
                        "genders": [
                            {
                                "id": 669,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": 9,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1922,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/717-772/?format=api",
                                "id": "717-772",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/772/?format=api",
                                    "id": 772,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 888,
                                            "location": {
                                                "coordinates": [
                                                    24.9499813,
                                                    60.1665965
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Fabianinkatu 23",
                                            "street_name_sv": "Fabiansgatan 23",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1850,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 744,
                                            "owner": {
                                                "id": 711,
                                                "type": "yksityinen",
                                                "name": "Adalbert Baldauf"
                                            },
                                            "begin_day": 22,
                                            "begin_month": 1,
                                            "begin_year": 1872,
                                            "end_day": 16,
                                            "end_month": 7,
                                            "end_year": 1917,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1885,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1894,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/717-592/?format=api",
                                "id": "717-592",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/592/?format=api",
                                    "id": 592,
                                    "neighborhood": "Kruununhaka",
                                    "addresses": [
                                        {
                                            "id": 704,
                                            "location": {
                                                "coordinates": [
                                                    24.9510858,
                                                    60.1747825
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Unioninkatu 43",
                                            "street_name_sv": "Unionsagatan 43",
                                            "zip_code": "00170",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1819,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1870,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Helsingin esi- ja alkukouluopettajaseminaari 1897-1904",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 573,
                                            "owner": {
                                                "id": 542,
                                                "type": "yksityinen",
                                                "name": "A. F. Londén"
                                            },
                                            "begin_day": 26,
                                            "begin_month": 4,
                                            "begin_year": 1897,
                                            "end_day": 24,
                                            "end_month": 4,
                                            "end_year": 1898,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 574,
                                            "owner": {
                                                "id": 543,
                                                "type": "yksityinen",
                                                "name": "Frans E. Walmqvist"
                                            },
                                            "begin_day": 25,
                                            "begin_month": 4,
                                            "begin_year": 1898,
                                            "end_day": 16,
                                            "end_month": 9,
                                            "end_year": 1900,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 575,
                                            "owner": {
                                                "id": 544,
                                                "type": "yksityinen",
                                                "name": "Aug. A. Qvarnström"
                                            },
                                            "begin_day": 17,
                                            "begin_month": 9,
                                            "begin_year": 1900,
                                            "end_day": 9,
                                            "end_month": 11,
                                            "end_year": 1934,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": [
                                        {
                                            "id": 206,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A00000st3&w=1200&h=1200",
                                            "is_front": true
                                        },
                                        {
                                            "id": 37,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000000bt&w=1200&h=1200",
                                            "is_front": true
                                        }
                                    ]
                                },
                                "photos": [
                                    {
                                        "id": 37,
                                        "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000000bt&w=1200&h=1200",
                                        "is_front": true
                                    }
                                ],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1905,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1922,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/717-475/?format=api",
                                "id": "717-475",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/475/?format=api",
                                    "id": 475,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 300,
                                            "location": {
                                                "coordinates": [
                                                    24.9462886,
                                                    60.1667745
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Korkeavuorenkatu 47",
                                            "street_name_sv": "Högbergsgatan 47",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 746,
                                            "location": {
                                                "coordinates": [
                                                    24.9462886,
                                                    60.1667745
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Eteläesplanadi 18",
                                            "street_name_sv": "Södra esplanaden 18",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Aina Tavaststjernas småbarsskola 1889-1894, Suomen liikemiesten kauppaopisto 1900-1907",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 475,
                                            "owner": {
                                                "id": 273,
                                                "type": "yksityinen",
                                                "name": "Frans Oscar Liewendal"
                                            },
                                            "begin_day": 27,
                                            "begin_month": 10,
                                            "begin_year": 1851,
                                            "end_day": 18,
                                            "end_month": 12,
                                            "end_year": 1898,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 476,
                                            "owner": {
                                                "id": 558,
                                                "type": "yksityinen",
                                                "name": "Gust. Rud. Liewendal & Edv. Jul. Liewendal"
                                            },
                                            "begin_day": 27,
                                            "begin_month": 2,
                                            "begin_year": 1899,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1928,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": [
                                        {
                                            "id": 38,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000000a3&w=1200&h=1200",
                                            "is_front": true
                                        }
                                    ]
                                },
                                "photos": [
                                    {
                                        "id": 38,
                                        "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000000a3&w=1200&h=1200",
                                        "is_front": true
                                    }
                                ],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1894,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1904,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/717-771/?format=api",
                                "id": "717-771",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/771/?format=api",
                                    "id": 771,
                                    "neighborhood": "Kruununhaka",
                                    "addresses": [
                                        {
                                            "id": 887,
                                            "location": {
                                                "coordinates": [
                                                    24.9522273,
                                                    60.1703401
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Unioninkatu 29",
                                            "street_name_sv": "Unionsgatan 29",
                                            "zip_code": "00170",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1819,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1852,
                                    "architect": "Carl Ludvig Engel, Ernst Lohrmann",
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 743,
                                            "owner": {
                                                "id": 710,
                                                "type": "seurakunta",
                                                "name": "Suomen evankelis-luterilainen kirkko"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1811,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": [
                                        {
                                            "id": 36,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A00000spo&w=1200&h=1200",
                                            "is_front": true
                                        }
                                    ]
                                },
                                "photos": [
                                    {
                                        "id": 36,
                                        "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A00000spo&w=1200&h=1200",
                                        "is_front": true
                                    }
                                ],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": 9,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1884,
                                "ownership": true,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 770,
                                "owner": {
                                    "id": 708,
                                    "type": "yksityinen",
                                    "name": "Lorenz Nikolai Achté"
                                },
                                "begin_day": null,
                                "begin_month": 9,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 771,
                                "owner": {
                                    "id": 709,
                                    "type": "yksityinen",
                                    "name": "Emmy Achté"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1900,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1922,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 602,
                                "founder": {
                                    "id": 708,
                                    "type": "yksityinen",
                                    "name": "Lorenz Nikolai Achté"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 2282,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1799/?format=api",
                                    "id": 1799,
                                    "surname": "Achté",
                                    "first_name": "Lorenz Nikolai"
                                },
                                "begin_day": null,
                                "begin_month": 9,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 717
                            },
                            {
                                "id": 2283,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1800/?format=api",
                                    "id": 1800,
                                    "surname": "Achté",
                                    "first_name": "Emmy"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1900,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1922,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 717
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1882,
                                "end_year": 1922,
                                "arkiston_nimi": null,
                                "school": 717,
                                "name": 1148
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": 9,
                                "year": 1882,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun lakkauttaminen",
                                "day": null,
                                "month": null,
                                "year": 1922,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": 9,
                    "begin_year": 1882,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1900,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1799
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1007/?format=api",
            "id": 1007,
            "surname": "Hisinger",
            "first_name": "Augusta",
            "employers": [
                {
                    "id": 1244,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/509/?format=api",
                        "id": 509,
                        "names": [
                            {
                                "id": 800,
                                "official_name": "Augusta Hisingers småskola",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1899,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 531,
                                "language": "ruotsi",
                                "begin_year": 1899,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 874,
                                "type": {
                                    "id": 12,
                                    "name": "valmistava koulu",
                                    "description": "1870- 1977 Yksityinen kansakoulun alimpien luokkien kanssa rinnakkainen koulu, josta pyrittiin oppikouluun. Valmistavat koulut olivat usein pieniä ja eniten niitä oli Helsingissä 1900-luvun alkuvuosikymmeninä."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1899,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 509
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 556,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1899,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [],
                        "owners": [
                            {
                                "id": 540,
                                "owner": {
                                    "id": 280,
                                    "type": "yksityinen",
                                    "name": "Augusta Hisinger"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1899,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 425,
                                "founder": {
                                    "id": 280,
                                    "type": "yksityinen",
                                    "name": "Augusta Hisinger"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1244,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1007/?format=api",
                                    "id": 1007,
                                    "surname": "Hisinger",
                                    "first_name": "Augusta"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1899,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 509
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1899,
                                "end_year": 1900,
                                "arkiston_nimi": null,
                                "school": 509,
                                "name": 800
                            }
                        ],
                        "lifecycle_event": [],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1899,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1900,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1007
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1280/?format=api",
            "id": 1280,
            "surname": "Kurki",
            "first_name": "Martti",
            "employers": [
                {
                    "id": 1601,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/343/?format=api",
                        "id": 343,
                        "names": [
                            {
                                "id": 484,
                                "official_name": "Karjalan maanviljelyslyseo",
                                "other_names": null,
                                "begin_day": 5,
                                "begin_month": 12,
                                "begin_year": 1917,
                                "end_day": 30,
                                "end_month": 7,
                                "end_year": 1921,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 234,
                                "language": "suomi",
                                "begin_year": 1917,
                                "end_year": 1921,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 596,
                                "type": {
                                    "id": 28,
                                    "name": "maatalouslyseo",
                                    "description": "1908 - 1935 Kolmivuotinen oppikoulu, jonka pääsyvaatimuksena oli keskikoulun oppimäärä ja jossa opetettiin  reaalilyseon lukusuunnitelman lisäksi maatalouden alan oppiaineita. Antoi jatkokelpoisuuden maatalouden alan korkeakouluihin."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1917,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1921,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 343
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 552,
                                "gender": "poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1917,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1921,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 738,
                                "number": 3,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1917,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1921,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/343-558/?format=api",
                                "id": "343-558",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/558/?format=api",
                                    "id": 558,
                                    "neighborhood": null,
                                    "addresses": [
                                        {
                                            "id": 636,
                                            "location": null,
                                            "street_name_fi": "Hovioikeudenkatu 1",
                                            "street_name_sv": null,
                                            "zip_code": null,
                                            "municipality_fi": "Viipuri",
                                            "municipality_sv": "Viborg",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1913,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Viipuri reaalikoulu 1919-1939",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1919,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1921,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/343-588/?format=api",
                                "id": "343-588",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/588/?format=api",
                                    "id": 588,
                                    "neighborhood": null,
                                    "addresses": [
                                        {
                                            "id": 700,
                                            "location": null,
                                            "street_name_fi": "Abrahaminkatu",
                                            "street_name_sv": null,
                                            "zip_code": null,
                                            "municipality_fi": "Viipuri",
                                            "municipality_sv": "Viborg",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1876,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Karjalan maanviljelyslyseo 1917-1918",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1917,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "ownership": false,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 358,
                                "owner": {
                                    "id": 531,
                                    "type": "osakeyhtiö",
                                    "name": "Karjalan maanviljelyslyseo oy."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1917,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1921,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 277,
                                "founder": {
                                    "id": 531,
                                    "type": "osakeyhtiö",
                                    "name": "Karjalan maanviljelyslyseo oy."
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1601,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1280/?format=api",
                                    "id": 1280,
                                    "surname": "Kurki",
                                    "first_name": "Martti"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1917,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1921,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 343
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Koulu",
                                "begin_year": 1917,
                                "end_year": 1921,
                                "arkiston_nimi": "Karjalan maanviljelyslyseo, TARK mikä koulu nyt?",
                                "school": 343,
                                "name": 484
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun yhdistäminen toiseen kouluun",
                                "day": null,
                                "month": null,
                                "year": 1921,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": 5,
                                "month": 12,
                                "year": 1917,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [
                            {
                                "active_school": "https://api.hel.fi/kore/v1/school/343/?format=api",
                                "description": "joins",
                                "target_school": {
                                    "url": "https://api.hel.fi/kore/v1/school/100/?format=api",
                                    "id": 100,
                                    "names": [
                                        {
                                            "id": 174,
                                            "official_name": "Maunulan yhteiskoulu ja Helsingin matematiikkalukio",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1999,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 356,
                                            "official_name": "Maunulan yhteiskoulu",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1959,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1999,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 357,
                                            "official_name": "Vaasanrinteen yksityislyseo",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1940,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1958,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 358,
                                            "official_name": "Viipurin Realikoulu, Maanviljelys- ja kauppalyseo",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1920,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1940,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 359,
                                            "official_name": "Viipurin Realikoulu",
                                            "other_names": null,
                                            "begin_day": 20,
                                            "begin_month": 5,
                                            "begin_year": 1914,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1920,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ]
                                },
                                "day": 31,
                                "month": 1,
                                "year": 1921,
                                "reference": null
                            }
                        ],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1917,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1921,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1280
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/989/?format=api",
            "id": 989,
            "surname": "Brenner",
            "first_name": "Magnus",
            "employers": [
                {
                    "id": 1381,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/560/?format=api",
                        "id": 560,
                        "names": [
                            {
                                "id": 863,
                                "official_name": "Helsingfors realskola",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1873,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 555,
                                "language": "ruotsi",
                                "begin_year": 1873,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 943,
                                "type": {
                                    "id": 22,
                                    "name": "realilyseo",
                                    "description": "Oikea kirjoitusmuoto on reaalilyseo, mutta nimissä realilyseo. Tietosanakirjoissa 30- ja 60-luvuilla käytetään reaali muotoa, joten vaihtaisin siihen. Miksi ressun koulutyyppi ei ole reaalilyseo?"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1873,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 560
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 453,
                                "gender": "poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1873,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 644,
                                "number": 5,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1873,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/560-405/?format=api",
                                "id": "560-405",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/405/?format=api",
                                    "id": 405,
                                    "neighborhood": "Kluuvi",
                                    "addresses": [
                                        {
                                            "id": 474,
                                            "location": {
                                                "coordinates": [
                                                    24.9459973,
                                                    60.1686323
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Aleksanterinkatu 44",
                                            "street_name_sv": "Alexandersgatan 44",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1833,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 475,
                                            "location": {
                                                "coordinates": [
                                                    24.9459973,
                                                    60.1686323
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Mikonkatu 3",
                                            "street_name_sv": "Mikaelsgatan 3",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1901,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Förskolan till realskolan vuokrat. 1875-1895, Suomen liikemiesten kauppaopisto 1898-1899",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 376,
                                            "owner": {
                                                "id": 1,
                                                "type": "kunta",
                                                "name": "Helsingin kaupunki"
                                            },
                                            "begin_day": 1,
                                            "begin_month": 8,
                                            "begin_year": 1977,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 377,
                                            "owner": {
                                                "id": 242,
                                                "type": "yksityinen",
                                                "name": "Ulrik Palmu"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 12,
                                            "begin_year": 1862,
                                            "end_day": 16,
                                            "end_month": 3,
                                            "end_year": 1890,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 378,
                                            "owner": {
                                                "id": 243,
                                                "type": "yksityinen",
                                                "name": "Adolf Fredrik Böckerman"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 12,
                                            "begin_year": 1862,
                                            "end_day": 19,
                                            "end_month": 3,
                                            "end_year": 1893,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 379,
                                            "owner": {
                                                "id": 244,
                                                "type": "yksityinen",
                                                "name": "Erik Johan Willstedt"
                                            },
                                            "begin_day": 20,
                                            "begin_month": 3,
                                            "begin_year": 1893,
                                            "end_day": 12,
                                            "end_month": 4,
                                            "end_year": 1896,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 380,
                                            "owner": {
                                                "id": 557,
                                                "type": "osakeyhtiö",
                                                "name": "Palovakuutus oy. Pohjola"
                                            },
                                            "begin_day": 22,
                                            "begin_month": 6,
                                            "begin_year": 1896,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1873,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "ownership": false,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 606,
                                "owner": {
                                    "id": 3,
                                    "type": "valtio",
                                    "name": "Suomen valtio"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1873,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 478,
                                "founder": {
                                    "id": 3,
                                    "type": "valtio",
                                    "name": "Suomen valtio"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1381,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/989/?format=api",
                                    "id": 989,
                                    "surname": "Brenner",
                                    "first_name": "Magnus"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1873,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1880,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 560
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Kansallisarkisto",
                                "begin_year": 1842,
                                "end_year": 1883,
                                "arkiston_nimi": "Realskolans i Helsingfors arkiv",
                                "school": 560,
                                "name": null
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun lopettaminen",
                                "day": null,
                                "month": null,
                                "year": 1896,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1873,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1942,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1873,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1880,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 989
                },
                {
                    "id": 1224,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/498/?format=api",
                        "id": 498,
                        "names": [
                            {
                                "id": 787,
                                "official_name": "Förskolan till realskolan",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 528,
                                "language": "ruotsi",
                                "begin_year": 1875,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 860,
                                "type": {
                                    "id": 12,
                                    "name": "valmistava koulu",
                                    "description": "1870- 1977 Yksityinen kansakoulun alimpien luokkien kanssa rinnakkainen koulu, josta pyrittiin oppikouluun. Valmistavat koulut olivat usein pieniä ja eniten niitä oli Helsingissä 1900-luvun alkuvuosikymmeninä."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 498
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 555,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/498-405/?format=api",
                                "id": "498-405",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/405/?format=api",
                                    "id": 405,
                                    "neighborhood": "Kluuvi",
                                    "addresses": [
                                        {
                                            "id": 474,
                                            "location": {
                                                "coordinates": [
                                                    24.9459973,
                                                    60.1686323
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Aleksanterinkatu 44",
                                            "street_name_sv": "Alexandersgatan 44",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1833,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 475,
                                            "location": {
                                                "coordinates": [
                                                    24.9459973,
                                                    60.1686323
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Mikonkatu 3",
                                            "street_name_sv": "Mikaelsgatan 3",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1901,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Förskolan till realskolan vuokrat. 1875-1895, Suomen liikemiesten kauppaopisto 1898-1899",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 376,
                                            "owner": {
                                                "id": 1,
                                                "type": "kunta",
                                                "name": "Helsingin kaupunki"
                                            },
                                            "begin_day": 1,
                                            "begin_month": 8,
                                            "begin_year": 1977,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 377,
                                            "owner": {
                                                "id": 242,
                                                "type": "yksityinen",
                                                "name": "Ulrik Palmu"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 12,
                                            "begin_year": 1862,
                                            "end_day": 16,
                                            "end_month": 3,
                                            "end_year": 1890,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 378,
                                            "owner": {
                                                "id": 243,
                                                "type": "yksityinen",
                                                "name": "Adolf Fredrik Böckerman"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 12,
                                            "begin_year": 1862,
                                            "end_day": 19,
                                            "end_month": 3,
                                            "end_year": 1893,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 379,
                                            "owner": {
                                                "id": 244,
                                                "type": "yksityinen",
                                                "name": "Erik Johan Willstedt"
                                            },
                                            "begin_day": 20,
                                            "begin_month": 3,
                                            "begin_year": 1893,
                                            "end_day": 12,
                                            "end_month": 4,
                                            "end_year": 1896,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 380,
                                            "owner": {
                                                "id": 557,
                                                "type": "osakeyhtiö",
                                                "name": "Palovakuutus oy. Pohjola"
                                            },
                                            "begin_day": 22,
                                            "begin_month": 6,
                                            "begin_year": 1896,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "ownership": false,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 520,
                                "owner": {
                                    "id": 245,
                                    "type": "yksityinen",
                                    "name": "M. Brenner"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 408,
                                "founder": {
                                    "id": 245,
                                    "type": "yksityinen",
                                    "name": "M. Brenner"
                                },
                                "reference": null
                            },
                            {
                                "id": 409,
                                "founder": {
                                    "id": 246,
                                    "type": "yksityinen",
                                    "name": "E. Amnell"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1224,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/989/?format=api",
                                    "id": 989,
                                    "surname": "Brenner",
                                    "first_name": "Magnus"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1878,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 498
                            },
                            {
                                "id": 1225,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/990/?format=api",
                                    "id": 990,
                                    "surname": "Dreijer",
                                    "first_name": "G."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1878,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1881,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 498
                            },
                            {
                                "id": 1226,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/991/?format=api",
                                    "id": 991,
                                    "surname": "Collander",
                                    "first_name": "Jonathan"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1881,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1883,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 498
                            },
                            {
                                "id": 1227,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/989/?format=api",
                                    "id": 989,
                                    "surname": "Brenner",
                                    "first_name": "Magnus"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1883,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 498
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1875,
                                "end_year": 1895,
                                "arkiston_nimi": null,
                                "school": 498,
                                "name": 787
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun lopettaminen",
                                "day": null,
                                "month": null,
                                "year": 1895,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1875,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1875,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1878,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 989
                },
                {
                    "id": 1227,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/498/?format=api",
                        "id": 498,
                        "names": [
                            {
                                "id": 787,
                                "official_name": "Förskolan till realskolan",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 528,
                                "language": "ruotsi",
                                "begin_year": 1875,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 860,
                                "type": {
                                    "id": 12,
                                    "name": "valmistava koulu",
                                    "description": "1870- 1977 Yksityinen kansakoulun alimpien luokkien kanssa rinnakkainen koulu, josta pyrittiin oppikouluun. Valmistavat koulut olivat usein pieniä ja eniten niitä oli Helsingissä 1900-luvun alkuvuosikymmeninä."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 498
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 555,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/498-405/?format=api",
                                "id": "498-405",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/405/?format=api",
                                    "id": 405,
                                    "neighborhood": "Kluuvi",
                                    "addresses": [
                                        {
                                            "id": 474,
                                            "location": {
                                                "coordinates": [
                                                    24.9459973,
                                                    60.1686323
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Aleksanterinkatu 44",
                                            "street_name_sv": "Alexandersgatan 44",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1833,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 475,
                                            "location": {
                                                "coordinates": [
                                                    24.9459973,
                                                    60.1686323
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Mikonkatu 3",
                                            "street_name_sv": "Mikaelsgatan 3",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1901,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Förskolan till realskolan vuokrat. 1875-1895, Suomen liikemiesten kauppaopisto 1898-1899",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 376,
                                            "owner": {
                                                "id": 1,
                                                "type": "kunta",
                                                "name": "Helsingin kaupunki"
                                            },
                                            "begin_day": 1,
                                            "begin_month": 8,
                                            "begin_year": 1977,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 377,
                                            "owner": {
                                                "id": 242,
                                                "type": "yksityinen",
                                                "name": "Ulrik Palmu"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 12,
                                            "begin_year": 1862,
                                            "end_day": 16,
                                            "end_month": 3,
                                            "end_year": 1890,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 378,
                                            "owner": {
                                                "id": 243,
                                                "type": "yksityinen",
                                                "name": "Adolf Fredrik Böckerman"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 12,
                                            "begin_year": 1862,
                                            "end_day": 19,
                                            "end_month": 3,
                                            "end_year": 1893,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 379,
                                            "owner": {
                                                "id": 244,
                                                "type": "yksityinen",
                                                "name": "Erik Johan Willstedt"
                                            },
                                            "begin_day": 20,
                                            "begin_month": 3,
                                            "begin_year": 1893,
                                            "end_day": 12,
                                            "end_month": 4,
                                            "end_year": 1896,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 380,
                                            "owner": {
                                                "id": 557,
                                                "type": "osakeyhtiö",
                                                "name": "Palovakuutus oy. Pohjola"
                                            },
                                            "begin_day": 22,
                                            "begin_month": 6,
                                            "begin_year": 1896,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "ownership": false,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 520,
                                "owner": {
                                    "id": 245,
                                    "type": "yksityinen",
                                    "name": "M. Brenner"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 408,
                                "founder": {
                                    "id": 245,
                                    "type": "yksityinen",
                                    "name": "M. Brenner"
                                },
                                "reference": null
                            },
                            {
                                "id": 409,
                                "founder": {
                                    "id": 246,
                                    "type": "yksityinen",
                                    "name": "E. Amnell"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1224,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/989/?format=api",
                                    "id": 989,
                                    "surname": "Brenner",
                                    "first_name": "Magnus"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1878,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 498
                            },
                            {
                                "id": 1225,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/990/?format=api",
                                    "id": 990,
                                    "surname": "Dreijer",
                                    "first_name": "G."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1878,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1881,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 498
                            },
                            {
                                "id": 1226,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/991/?format=api",
                                    "id": 991,
                                    "surname": "Collander",
                                    "first_name": "Jonathan"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1881,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1883,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 498
                            },
                            {
                                "id": 1227,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/989/?format=api",
                                    "id": 989,
                                    "surname": "Brenner",
                                    "first_name": "Magnus"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1883,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 498
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1875,
                                "end_year": 1895,
                                "arkiston_nimi": null,
                                "school": 498,
                                "name": 787
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun lopettaminen",
                                "day": null,
                                "month": null,
                                "year": 1895,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1875,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1883,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1895,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 989
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1032/?format=api",
            "id": 1032,
            "surname": "Wulisma",
            "first_name": "Natalia",
            "employers": [
                {
                    "id": 1277,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/525/?format=api",
                        "id": 525,
                        "names": [
                            {
                                "id": 817,
                                "official_name": "Natalia Wulismas småbarnskola",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1853,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1892,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 540,
                                "language": "ruotsi",
                                "begin_year": 1953,
                                "end_year": 1892,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 896,
                                "type": {
                                    "id": 12,
                                    "name": "valmistava koulu",
                                    "description": "1870- 1977 Yksityinen kansakoulun alimpien luokkien kanssa rinnakkainen koulu, josta pyrittiin oppikouluun. Valmistavat koulut olivat usein pieniä ja eniten niitä oli Helsingissä 1900-luvun alkuvuosikymmeninä."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1853,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1892,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 525
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 411,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1853,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1892,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 578,
                                "number": 4,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1853,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1892,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/525-445/?format=api",
                                "id": "525-445",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/445/?format=api",
                                    "id": 445,
                                    "neighborhood": "Kamppi",
                                    "addresses": [
                                        {
                                            "id": 522,
                                            "location": {
                                                "coordinates": [
                                                    24.9388014,
                                                    60.167713
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Vladimirinkatu 5",
                                            "street_name_sv": "Vladimirsgatan 5",
                                            "zip_code": null,
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1909,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1928,
                                            "comment": "nyk. Kalevankatu 5",
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 523,
                                            "location": {
                                                "coordinates": [
                                                    24.9386317,
                                                    60.1677675
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Kalevankatu 5",
                                            "street_name_sv": "Kalevagatan 5",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Vladimirinkatu 5",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Natalia Wulismas Småbarnskola",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 426,
                                            "owner": {
                                                "id": 313,
                                                "type": "yksityinen",
                                                "name": "August Alfred Westerberg"
                                            },
                                            "begin_day": 6,
                                            "begin_month": 11,
                                            "begin_year": 1852,
                                            "end_day": 18,
                                            "end_month": 11,
                                            "end_year": 1860,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 427,
                                            "owner": {
                                                "id": 314,
                                                "type": "yksityinen",
                                                "name": "Erik S. Westerberg"
                                            },
                                            "begin_day": 6,
                                            "begin_month": 11,
                                            "begin_year": 1852,
                                            "end_day": 28,
                                            "end_month": 3,
                                            "end_year": 1859,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 428,
                                            "owner": {
                                                "id": 315,
                                                "type": "yksityinen",
                                                "name": "Karl Viktor Westerberg"
                                            },
                                            "begin_day": 6,
                                            "begin_month": 11,
                                            "begin_year": 1852,
                                            "end_day": 2,
                                            "end_month": 2,
                                            "end_year": 1864,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 429,
                                            "owner": {
                                                "id": 316,
                                                "type": "yksityinen",
                                                "name": "Karl Johan Wikberg"
                                            },
                                            "begin_day": 3,
                                            "begin_month": 2,
                                            "begin_year": 1864,
                                            "end_day": 20,
                                            "end_month": 8,
                                            "end_year": 1865,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 430,
                                            "owner": {
                                                "id": 317,
                                                "type": "yksityinen",
                                                "name": "Karl E. Lindholm"
                                            },
                                            "begin_day": 21,
                                            "begin_month": 8,
                                            "begin_year": 1865,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1897,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1853,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1891,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/525-446/?format=api",
                                "id": "525-446",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/446/?format=api",
                                    "id": 446,
                                    "neighborhood": "Kamppi",
                                    "addresses": [
                                        {
                                            "id": 524,
                                            "location": {
                                                "coordinates": [
                                                    24.9374598,
                                                    60.1683503
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Yrjönkatu 27",
                                            "street_name_sv": "Georgsgatan 27",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1909,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Natalia Wulismas Småbarnskola",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 431,
                                            "owner": {
                                                "id": 318,
                                                "type": "yksityinen",
                                                "name": "Paul Mickwitz"
                                            },
                                            "begin_day": 9,
                                            "begin_month": 8,
                                            "begin_year": 1852,
                                            "end_day": 4,
                                            "end_month": 4,
                                            "end_year": 1899,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1891,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1892,
                                "ownership": false,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 557,
                                "owner": {
                                    "id": 312,
                                    "type": "yksityinen",
                                    "name": "Natalia Wulisma"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1853,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1892,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 440,
                                "founder": {
                                    "id": 312,
                                    "type": "yksityinen",
                                    "name": "Natalia Wulisma"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1277,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1032/?format=api",
                                    "id": 1032,
                                    "surname": "Wulisma",
                                    "first_name": "Natalia"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1853,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1892,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 525
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1853,
                                "end_year": 1892,
                                "arkiston_nimi": null,
                                "school": 525,
                                "name": 817
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1853,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1853,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1892,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1032
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/960/?format=api",
            "id": 960,
            "surname": "Mattsson",
            "first_name": "Edla",
            "employers": [
                {
                    "id": 1190,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/468/?format=api",
                        "id": 468,
                        "names": [
                            {
                                "id": 749,
                                "official_name": "Alempi kansakoulu N:o 12",
                                "other_names": null,
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 291,
                                "language": "suomi",
                                "begin_year": 1877,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 835,
                                "type": {
                                    "id": 1,
                                    "name": "kansakoulu",
                                    "description": "1858-1977 6 lk, maksuton perusopetusta antava koulu. Vuoden 1866 kansakouluasetuksesta lähtien kaupungeissa asuville 8–14-vuotiaille lapsille tuli tarjota perusopetusta. Kansakoulusta saattoi hakea oppikouluun ja ammattikouluun."
                                },
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 468
                            },
                            {
                                "id": 836,
                                "type": {
                                    "id": 2,
                                    "name": "alakansakoulu",
                                    "description": "1867-1958 Kansakoulun kaksi ensimmäistä vuosiluokkaa, jossa annettiin alkeisopetusta. Vuodesta 1958 peruskoulu-uudistukseen 1977 asti kansakoulu oli yhtenäinen, eikä sitä enää jaettu ala- ja yläkansakouluun."
                                },
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 468
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 362,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 511,
                                "number": 2,
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [],
                        "owners": [
                            {
                                "id": 498,
                                "owner": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 385,
                                "founder": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1185,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/957/?format=api",
                                    "id": 957,
                                    "surname": "Roos",
                                    "first_name": "J. A."
                                },
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1878,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 468
                            },
                            {
                                "id": 1190,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/960/?format=api",
                                    "id": 960,
                                    "surname": "Mattsson",
                                    "first_name": "Edla"
                                },
                                "begin_day": null,
                                "begin_month": 1,
                                "begin_year": 1879,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1896,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 468
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1877,
                                "end_year": 1896,
                                "arkiston_nimi": null,
                                "school": 468,
                                "name": 749
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun perustaminen",
                                "day": 5,
                                "month": 9,
                                "year": 1877,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": 1,
                    "begin_year": 1879,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1896,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 960
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1214/?format=api",
            "id": 1214,
            "surname": "Sederholm",
            "first_name": "J.",
            "employers": [
                {
                    "id": 1500,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/562/?format=api",
                        "id": 562,
                        "names": [
                            {
                                "id": 865,
                                "official_name": "Deutsche privat Töchterschule",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1862,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1894,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 638,
                                "language": "saksa",
                                "begin_year": 1862,
                                "end_year": 1894,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 946,
                                "type": {
                                    "id": 5,
                                    "name": "oppikoulu",
                                    "description": "1829-1977. Keskikoulusta ja lukiosta koostuva koulu, johon haettiin pääsykokeilla useimmiten kansakoulun 4. luokalta. Maksullinen koulu, joissa oli vapaaoppilaskiintiöt. 1977 oppikoulut luovuttautuivat kunnallisiksi kouluiksi tai jäivät yksityisiksi."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1862,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1894,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 562
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 456,
                                "gender": "tyttökoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1862,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1894,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 662,
                                "number": 9,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1862,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1894,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/562-396/?format=api",
                                "id": "562-396",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/396/?format=api",
                                    "id": 396,
                                    "neighborhood": "Kamppi",
                                    "addresses": [
                                        {
                                            "id": 466,
                                            "location": {
                                                "coordinates": [
                                                    24.9430297,
                                                    60.1660551
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Bulevardi 2",
                                            "street_name_sv": "Bulevarden 2",
                                            "zip_code": "00120",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 614,
                                            "location": {
                                                "coordinates": [
                                                    24.9430297,
                                                    60.1660551
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Erottajankatu 4",
                                            "street_name_sv": "Skillnadsgatan 4",
                                            "zip_code": "00120",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Erottaja 8",
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 615,
                                            "location": {
                                                "coordinates": [
                                                    24.9433279,
                                                    60.1656679
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Erottaja 8",
                                            "street_name_sv": "Skilnaden 8",
                                            "zip_code": null,
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1928,
                                            "comment": "nyk. Erottajankatu 4",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Deutsche Schule",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 355,
                                            "owner": {
                                                "id": 215,
                                                "type": "yksityinen",
                                                "name": "F. H. Paersch"
                                            },
                                            "begin_day": 28,
                                            "begin_month": 3,
                                            "begin_year": 1881,
                                            "end_day": 2,
                                            "end_month": 12,
                                            "end_year": 1894,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 356,
                                            "owner": {
                                                "id": 216,
                                                "type": "yksityinen",
                                                "name": "Aug. Ferlman"
                                            },
                                            "begin_day": 3,
                                            "begin_month": 12,
                                            "begin_year": 1894,
                                            "end_day": 21,
                                            "end_month": 2,
                                            "end_year": 1897,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 357,
                                            "owner": {
                                                "id": 217,
                                                "type": "yksityinen",
                                                "name": "C. G. Sanmark"
                                            },
                                            "begin_day": 22,
                                            "begin_month": 2,
                                            "begin_year": 1897,
                                            "end_day": 9,
                                            "end_month": 4,
                                            "end_year": 1899,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 358,
                                            "owner": {
                                                "id": 218,
                                                "type": "osakeyhtiö",
                                                "name": "H:fors Centraltryckeri & Bokbinderi AB"
                                            },
                                            "begin_day": 10,
                                            "begin_month": 4,
                                            "begin_year": 1899,
                                            "end_day": 28,
                                            "end_month": 1,
                                            "end_year": 1917,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 359,
                                            "owner": {
                                                "id": 430,
                                                "type": "yksityinen",
                                                "name": "Robert Ullner"
                                            },
                                            "begin_day": 28,
                                            "begin_month": 9,
                                            "begin_year": 1874,
                                            "end_day": 29,
                                            "end_month": 4,
                                            "end_year": 1877,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 360,
                                            "owner": {
                                                "id": 431,
                                                "type": "yksityinen",
                                                "name": "Henrik Jackens"
                                            },
                                            "begin_day": 30,
                                            "begin_month": 4,
                                            "begin_year": 1877,
                                            "end_day": 8,
                                            "end_month": 12,
                                            "end_year": 1878,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 361,
                                            "owner": {
                                                "id": 432,
                                                "type": "yksityinen",
                                                "name": "Joh. Edv. Westerlund"
                                            },
                                            "begin_day": 9,
                                            "begin_month": 12,
                                            "begin_year": 1878,
                                            "end_day": 27,
                                            "end_month": 3,
                                            "end_year": 1881,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1875,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1894,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/562-549/?format=api",
                                "id": "562-549",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/549/?format=api",
                                    "id": 549,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 651,
                                            "location": {
                                                "coordinates": [
                                                    24.9511382,
                                                    60.1637696
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Unioninkatu 4",
                                            "street_name_sv": "Unionsgatan 4",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1819,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Deutsche Privat Töcherschule 1876-1877",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 535,
                                            "owner": {
                                                "id": 474,
                                                "type": "yksityinen",
                                                "name": "Johan Frans Osc. Wikström"
                                            },
                                            "begin_day": 18,
                                            "begin_month": 7,
                                            "begin_year": 1859,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1886,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1876,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1877,
                                "ownership": false,
                                "reference": null
                            }
                        ],
                        "owners": [],
                        "founders": [],
                        "principals": [
                            {
                                "id": 1500,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1214/?format=api",
                                    "id": 1214,
                                    "surname": "Sederholm",
                                    "first_name": "J."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1868,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1870,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 562
                            },
                            {
                                "id": 1501,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1215/?format=api",
                                    "id": 1215,
                                    "surname": "Mickwitz",
                                    "first_name": "H."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1870,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1876,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 562
                            },
                            {
                                "id": 1504,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1217/?format=api",
                                    "id": 1217,
                                    "surname": "Paersch",
                                    "first_name": "Jenny"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1879,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1884,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 562
                            },
                            {
                                "id": 1505,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1218/?format=api",
                                    "id": 1218,
                                    "surname": "Paersch",
                                    "first_name": "F. A."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1876,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1877,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 562
                            },
                            {
                                "id": 1512,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1224/?format=api",
                                    "id": 1224,
                                    "surname": "Baranovsky",
                                    "first_name": "Nti."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1884,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1889,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 562
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1862,
                                "end_year": 1894,
                                "arkiston_nimi": null,
                                "school": 562,
                                "name": 865
                            }
                        ],
                        "lifecycle_event": [],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1868,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1870,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1214
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1220/?format=api",
            "id": 1220,
            "surname": "Linsén",
            "first_name": "Mathilda",
            "employers": [
                {
                    "id": 1507,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/165/?format=api",
                        "id": 165,
                        "names": [
                            {
                                "id": 181,
                                "official_name": "Svenska skolan för synskadade",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1930,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 889,
                                "official_name": "Blindanstalten i Helsingfors",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1865,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1930,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 140,
                                "language": "suomi",
                                "begin_year": 1865,
                                "end_year": 1972,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 434,
                                "language": "ruotsi",
                                "begin_year": 1865,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 371,
                                "type": {
                                    "id": 14,
                                    "name": "erityiskoulu",
                                    "description": "1977- Peruskouluun kuuluva oppivelvollisuuskoulu oppilaille, jotka tarvitsevat erityistä tukea tai joilla on oppimisvaikuksia. Ennen peruskoulu-uudistusta 1977 samaa tarkoitusta varten oli kunnallisia apukouluja."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1865,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 165
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 478,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1865,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/165-178/?format=api",
                                "id": "165-178",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/178/?format=api",
                                    "id": 178,
                                    "neighborhood": "Arabianranta",
                                    "addresses": [
                                        {
                                            "id": 177,
                                            "location": {
                                                "coordinates": [
                                                    24.9703207,
                                                    60.2019478
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Pariisinkuja 2 A 2",
                                            "street_name_sv": "Parisgränden 2 A 2",
                                            "zip_code": "00550",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1998,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 2009,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Svenska skolan för synskadade",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 2009,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/165-551/?format=api",
                                "id": "165-551",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/551/?format=api",
                                    "id": 551,
                                    "neighborhood": "Kaivopuisto",
                                    "addresses": [
                                        {
                                            "id": 654,
                                            "location": {
                                                "coordinates": [
                                                    24.9603524,
                                                    60.158344
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Kalliolinnantie 13",
                                            "street_name_sv": "Kalliolinnavägen 13",
                                            "zip_code": "00140",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Huvilatie 13",
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 655,
                                            "location": {
                                                "coordinates": [
                                                    25.1016748,
                                                    60.2264957
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Huvilatie 13",
                                            "street_name_sv": "Villavägen 13",
                                            "zip_code": null,
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1800,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1928,
                                            "comment": "nyk. Kalliolinnantie 13",
                                            "approx_begin": true,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Blindanstalten i Helsingfors 1865-1872",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 537,
                                            "owner": {
                                                "id": 479,
                                                "type": "yksityinen",
                                                "name": "Roland Mellin"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1859,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1871,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1865,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1872,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/165-552/?format=api",
                                "id": "165-552",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/552/?format=api",
                                    "id": 552,
                                    "neighborhood": "Kruununhaka",
                                    "addresses": [
                                        {
                                            "id": 656,
                                            "location": {
                                                "coordinates": [
                                                    24.9579932,
                                                    60.1737672
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Konstantininkatu 22",
                                            "street_name_sv": "Konstantinsgatan 22",
                                            "zip_code": "00170",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1928,
                                            "comment": "nyk. Meritullinkatu 22",
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 657,
                                            "location": {
                                                "coordinates": [
                                                    24.9579874,
                                                    60.1737437
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Meritullinkatu 22",
                                            "street_name_sv": "Sjötullsgatan 22",
                                            "zip_code": "00170",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Konstantininkatu 22",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Blindanstalten i Helsingfors 1872-1886",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 538,
                                            "owner": {
                                                "id": 480,
                                                "type": "yksityinen",
                                                "name": "Jonas Gustafsson"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 6,
                                            "begin_year": 1857,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1916,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1872,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1886,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/165-553/?format=api",
                                "id": "165-553",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/553/?format=api",
                                    "id": 553,
                                    "neighborhood": "Kruununhaka",
                                    "addresses": [
                                        {
                                            "id": 658,
                                            "location": {
                                                "coordinates": [
                                                    24.9580057,
                                                    60.1735014
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Maneesikatu 5",
                                            "street_name_sv": "Manegegatan 5",
                                            "zip_code": "00170",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1836,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Blindanstalten i Helsingfors 1886-1898",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 539,
                                            "owner": {
                                                "id": 481,
                                                "type": "yksityinen",
                                                "name": "Zelma Lindh"
                                            },
                                            "begin_day": 14,
                                            "begin_month": 6,
                                            "begin_year": 1883,
                                            "end_day": 8,
                                            "end_month": 7,
                                            "end_year": 1906,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1886,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1898,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/165-554/?format=api",
                                "id": "165-554",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/554/?format=api",
                                    "id": 554,
                                    "neighborhood": "Kallio",
                                    "addresses": [
                                        {
                                            "id": 659,
                                            "location": {
                                                "coordinates": [
                                                    24.9420641,
                                                    60.1830532
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Ensi Linja 1",
                                            "street_name_sv": "Första linjen 1",
                                            "zip_code": "00530",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1887,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 854,
                                            "location": {
                                                "coordinates": [
                                                    24.9413763,
                                                    60.1833034
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Ensi linja 9",
                                            "street_name_sv": "Första linjen 9",
                                            "zip_code": "00530",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1887,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "Kadun numerointi on muuttunu, nykyään osoite on Ensi Linja 1.",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1898,
                                    "architect": "Ernst Theodor Granstedt",
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Blindanstalten i Helsingfors 1898-1970",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 540,
                                            "owner": {
                                                "id": 3,
                                                "type": "valtio",
                                                "name": "Suomen valtio"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1950,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 541,
                                            "owner": {
                                                "id": 482,
                                                "type": "muu",
                                                "name": "Blindskolan"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1898,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1950,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1898,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1970,
                                "ownership": true,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 223,
                                "owner": {
                                    "id": 3,
                                    "type": "valtio",
                                    "name": "Suomen valtio"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": null,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 165,
                                "founder": {
                                    "id": 477,
                                    "type": "yksityinen",
                                    "name": "Uno Cygneaus"
                                },
                                "reference": null
                            },
                            {
                                "id": 166,
                                "founder": {
                                    "id": 478,
                                    "type": "yksityinen",
                                    "name": "Carl Henrik Alopaeus"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1507,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1220/?format=api",
                                    "id": 1220,
                                    "surname": "Linsén",
                                    "first_name": "Mathilda"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1865,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1870,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 165
                            },
                            {
                                "id": 1508,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1221/?format=api",
                                    "id": 1221,
                                    "surname": "Ingman",
                                    "first_name": "Johanna M."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1903,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 165
                            }
                        ],
                        "special_features": "Erityiskoulu",
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Koulu",
                                "begin_year": 1865,
                                "end_year": null,
                                "arkiston_nimi": "Svenska skolan för synskadade",
                                "school": 165,
                                "name": 181
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun siirtyminen toiseen kuntaan",
                                "day": null,
                                "month": null,
                                "year": 1972,
                                "decisionmaker": null,
                                "additional_info": "Koulun suomalainen osasto muutti Jyväskylään."
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": 1,
                                "month": 10,
                                "year": 1865,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1865,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1870,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1220
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/955/?format=api",
            "id": 955,
            "surname": "Gumberg",
            "first_name": "Emilia Charlotta",
            "employers": [
                {
                    "id": 1183,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/467/?format=api",
                        "id": 467,
                        "names": [
                            {
                                "id": 748,
                                "official_name": "Alempi kansakoulu N:o 11",
                                "other_names": null,
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1891,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 514,
                                "language": "ruotsi",
                                "begin_year": 1877,
                                "end_year": 1891,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 833,
                                "type": {
                                    "id": 1,
                                    "name": "kansakoulu",
                                    "description": "1858-1977 6 lk, maksuton perusopetusta antava koulu. Vuoden 1866 kansakouluasetuksesta lähtien kaupungeissa asuville 8–14-vuotiaille lapsille tuli tarjota perusopetusta. Kansakoulusta saattoi hakea oppikouluun ja ammattikouluun."
                                },
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1891,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 467
                            },
                            {
                                "id": 834,
                                "type": {
                                    "id": 2,
                                    "name": "alakansakoulu",
                                    "description": "1867-1958 Kansakoulun kaksi ensimmäistä vuosiluokkaa, jossa annettiin alkeisopetusta. Vuodesta 1958 peruskoulu-uudistukseen 1977 asti kansakoulu oli yhtenäinen, eikä sitä enää jaettu ala- ja yläkansakouluun."
                                },
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1891,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 467
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 361,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1891,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 510,
                                "number": 2,
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1891,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [],
                        "owners": [
                            {
                                "id": 497,
                                "owner": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1891,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 384,
                                "founder": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1182,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/954/?format=api",
                                    "id": 954,
                                    "surname": "Witting",
                                    "first_name": "Johanna Alvina"
                                },
                                "begin_day": 5,
                                "begin_month": 9,
                                "begin_year": 1877,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1888,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 467
                            },
                            {
                                "id": 1183,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/955/?format=api",
                                    "id": 955,
                                    "surname": "Gumberg",
                                    "first_name": "Emilia Charlotta"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1886,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1887,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 467
                            },
                            {
                                "id": 1184,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/956/?format=api",
                                    "id": 956,
                                    "surname": "Finander",
                                    "first_name": "Lydia Sofia"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1886,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1887,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 467
                            },
                            {
                                "id": 1210,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/978/?format=api",
                                    "id": 978,
                                    "surname": "Sagulin",
                                    "first_name": "Rosa Natalia"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1888,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1890,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 467
                            },
                            {
                                "id": 1211,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/979/?format=api",
                                    "id": 979,
                                    "surname": "Rosberg",
                                    "first_name": "Johanna Alvira"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1890,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1891,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 467
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1877,
                                "end_year": 1891,
                                "arkiston_nimi": null,
                                "school": 467,
                                "name": 748
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun perustaminen",
                                "day": 5,
                                "month": 9,
                                "year": 1877,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1886,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1887,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 955
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/958/?format=api",
            "id": 958,
            "surname": "Kroijerus",
            "first_name": "Mimmi Albertina Kristina",
            "employers": [
                {
                    "id": 1186,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/469/?format=api",
                        "id": 469,
                        "names": [
                            {
                                "id": 750,
                                "official_name": "Alempi kansakoulu N:o 13",
                                "other_names": null,
                                "begin_day": 9,
                                "begin_month": 9,
                                "begin_year": 1878,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1902,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 515,
                                "language": "ruotsi",
                                "begin_year": 1878,
                                "end_year": 1902,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 837,
                                "type": {
                                    "id": 1,
                                    "name": "kansakoulu",
                                    "description": "1858-1977 6 lk, maksuton perusopetusta antava koulu. Vuoden 1866 kansakouluasetuksesta lähtien kaupungeissa asuville 8–14-vuotiaille lapsille tuli tarjota perusopetusta. Kansakoulusta saattoi hakea oppikouluun ja ammattikouluun."
                                },
                                "begin_day": 9,
                                "begin_month": 9,
                                "begin_year": 1878,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1902,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 469
                            },
                            {
                                "id": 838,
                                "type": {
                                    "id": 2,
                                    "name": "alakansakoulu",
                                    "description": "1867-1958 Kansakoulun kaksi ensimmäistä vuosiluokkaa, jossa annettiin alkeisopetusta. Vuodesta 1958 peruskoulu-uudistukseen 1977 asti kansakoulu oli yhtenäinen, eikä sitä enää jaettu ala- ja yläkansakouluun."
                                },
                                "begin_day": 9,
                                "begin_month": 9,
                                "begin_year": 1878,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1902,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 469
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 363,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": 9,
                                "begin_month": 9,
                                "begin_year": 1878,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1902,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 512,
                                "number": 2,
                                "begin_day": 9,
                                "begin_month": 9,
                                "begin_year": 1878,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1902,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [],
                        "owners": [
                            {
                                "id": 499,
                                "owner": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "begin_day": 9,
                                "begin_month": 9,
                                "begin_year": 1878,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1902,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 386,
                                "founder": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1186,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/958/?format=api",
                                    "id": 958,
                                    "surname": "Kroijerus",
                                    "first_name": "Mimmi Albertina Kristina"
                                },
                                "begin_day": 9,
                                "begin_month": 9,
                                "begin_year": 1878,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1902,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 469
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1878,
                                "end_year": 1902,
                                "arkiston_nimi": null,
                                "school": 469,
                                "name": 750
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun perustaminen",
                                "day": 9,
                                "month": 9,
                                "year": 1878,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": 9,
                    "begin_month": 9,
                    "begin_year": 1878,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1902,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 958
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/975/?format=api",
            "id": 975,
            "surname": "Wiberg",
            "first_name": "Helmi",
            "employers": [
                {
                    "id": 1206,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/494/?format=api",
                        "id": 494,
                        "names": [
                            {
                                "id": 782,
                                "official_name": "Helmi Wibergs förberedande skola",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1908,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 524,
                                "language": "ruotsi",
                                "begin_year": 1908,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 855,
                                "type": {
                                    "id": 12,
                                    "name": "valmistava koulu",
                                    "description": "1870- 1977 Yksityinen kansakoulun alimpien luokkien kanssa rinnakkainen koulu, josta pyrittiin oppikouluun. Valmistavat koulut olivat usein pieniä ja eniten niitä oli Helsingissä 1900-luvun alkuvuosikymmeninä."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1908,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 494
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 378,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1908,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 535,
                                "number": 4,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1908,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [],
                        "owners": [
                            {
                                "id": 514,
                                "owner": {
                                    "id": 237,
                                    "type": "yksityinen",
                                    "name": "Helmi Wiberg"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1908,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 399,
                                "founder": {
                                    "id": 237,
                                    "type": "yksityinen",
                                    "name": "Helmi Wiberg"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1206,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/975/?format=api",
                                    "id": 975,
                                    "surname": "Wiberg",
                                    "first_name": "Helmi"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1908,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 494
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1908,
                                "end_year": 1916,
                                "arkiston_nimi": null,
                                "school": 494,
                                "name": 782
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun lopettaminen",
                                "day": null,
                                "month": null,
                                "year": 1916,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1908,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1908,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1916,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 975
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1882/?format=api",
            "id": 1882,
            "surname": "Ekman",
            "first_name": "Karl",
            "employers": [
                {
                    "id": 2388,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/742/?format=api",
                        "id": 742,
                        "names": [
                            {
                                "id": 1201,
                                "official_name": "Helsingin musiikkiopisto",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1924,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1202,
                                "official_name": "Helsingin konservatorio",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1924,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1939,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1203,
                                "official_name": "Sibelius-Akatemia",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1939,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 693,
                                "language": "suomi",
                                "begin_year": 1882,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 1128,
                                "type": {
                                    "id": 17,
                                    "name": "ammattikoulu",
                                    "description": "Käytännölliseen ammattiin valmistava koulu. Ammattikoulut yleistyivät 1800-luvun lopulla, koulut olivat usein pieniä ja toimivat vain lyhyen aikaa. Peruskoulu-uudistuksen myötä ammattikouluja on yhdistetty suuriksi oppilaitoksiksi."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1980,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 742
                            },
                            {
                                "id": 1129,
                                "type": {
                                    "id": 31,
                                    "name": "korkeakoulu",
                                    "description": "Oppilaitos, jossa annetaan korkeinta tieteellistä tai ammatillista opetusta ja harjoitetaan tieteellistä tutkimusta. Korkeakoulu käsittää tieteelliset ja taiteelliset yliopistot sekä korkeakoulut."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1980,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 742
                            }
                        ],
                        "fields": [
                            {
                                "id": 80,
                                "field": {
                                    "id": 9,
                                    "name": "Kulttuuriala"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1882,
                                "approx_begin": false,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "approx_end": false,
                                "reference": null,
                                "main_school": 742
                            }
                        ],
                        "genders": [
                            {
                                "id": 695,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/742-639/?format=api",
                                "id": "742-639",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/639/?format=api",
                                    "id": 639,
                                    "neighborhood": "Taka-Töölö",
                                    "addresses": [
                                        {
                                            "id": 748,
                                            "location": {
                                                "coordinates": [
                                                    24.9261077,
                                                    60.1781546
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Töölönkatu 28",
                                            "street_name_sv": "Tölögatan 28",
                                            "zip_code": "00260",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1906,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1931,
                                    "architect": "Väinö Vähäkallio, Veikko Leinstén",
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 606,
                                            "owner": {
                                                "id": 3,
                                                "type": "valtio",
                                                "name": "Suomen valtio"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1978,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 607,
                                            "owner": {
                                                "id": 573,
                                                "type": "säätiö",
                                                "name": "Ammattienedistämislaitos-säätiö"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1929,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1978,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": null,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/742-805/?format=api",
                                "id": "742-805",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/805/?format=api",
                                    "id": 805,
                                    "neighborhood": "Etu-Töölö",
                                    "addresses": [
                                        {
                                            "id": 921,
                                            "location": {
                                                "coordinates": [
                                                    24.9325508,
                                                    60.1715344
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Pohjoinen Rautatienkatu 9",
                                            "street_name_sv": "Norra Järnvägsgatan 9",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1906,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1931,
                                    "architect": "Eino Forsman",
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 776,
                                            "owner": {
                                                "id": 745,
                                                "type": "säätiö",
                                                "name": "Sibelius-Akatemian Säätiö"
                                            },
                                            "begin_day": 16,
                                            "begin_month": 6,
                                            "begin_year": 1930,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1980,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 777,
                                            "owner": {
                                                "id": 3,
                                                "type": "valtio",
                                                "name": "Suomen valtio"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1980,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": [
                                        {
                                            "id": 6,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A0000046r&w=1200&h=1200",
                                            "is_front": true
                                        }
                                    ]
                                },
                                "photos": [
                                    {
                                        "id": 6,
                                        "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A0000046r&w=1200&h=1200",
                                        "is_front": true
                                    }
                                ],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1931,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "ownership": true,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 801,
                                "owner": {
                                    "id": 3,
                                    "type": "valtio",
                                    "name": "Suomen valtio"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1980,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 800,
                                "owner": {
                                    "id": 745,
                                    "type": "säätiö",
                                    "name": "Sibelius-Akatemian Säätiö"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1980,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 625,
                                "founder": {
                                    "id": 745,
                                    "type": "säätiö",
                                    "name": "Sibelius-Akatemian Säätiö"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 2386,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1880/?format=api",
                                    "id": 1880,
                                    "surname": "Wegelius",
                                    "first_name": "Martin"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1882,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1906,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 742
                            },
                            {
                                "id": 2387,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1881/?format=api",
                                    "id": 1881,
                                    "surname": "Järnefelt",
                                    "first_name": "Armas"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1906,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1907,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 742
                            },
                            {
                                "id": 2388,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1882/?format=api",
                                    "id": 1882,
                                    "surname": "Ekman",
                                    "first_name": "Karl"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1907,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1911,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 742
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Koulu",
                                "begin_year": 1882,
                                "end_year": null,
                                "arkiston_nimi": "Taideyliopisto",
                                "school": 742,
                                "name": 1017
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1882,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun muuttuminen korkeakouluksi",
                                "day": null,
                                "month": null,
                                "year": 1980,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun yhdistäminen toiseen kouluun",
                                "day": null,
                                "month": null,
                                "year": 2013,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1907,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1911,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1882
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1300/?format=api",
            "id": 1300,
            "surname": "Brunou",
            "first_name": "Karl Henrik",
            "employers": [
                {
                    "id": 1622,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/577/?format=api",
                        "id": 577,
                        "names": [
                            {
                                "id": 884,
                                "official_name": "Helsingfors trivialskola",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1641,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1841,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 566,
                                "language": "ruotsi",
                                "begin_year": 1641,
                                "end_year": 1841,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 962,
                                "type": {
                                    "id": 21,
                                    "name": "alkeiskoulu",
                                    "description": "1550-luvulta 1800-luvun alkuun asti alkeiskoulu oli Helsingin ainoa koulutyyppi. Alkeiskouluissa annettiin nimenä mukaisesti alkeisopetusta. 1900-luvun alussa valmistavat koulut ja kansakoulun yleistyminen korvasi alkeiskoulut."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1641,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1841,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 577
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 474,
                                "gender": "poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1641,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1841,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 653,
                                "number": 3,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1641,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1820,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 752,
                                "number": 4,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1820,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1841,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/577-544/?format=api",
                                "id": "577-544",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/544/?format=api",
                                    "id": 544,
                                    "neighborhood": "Kruununhaka",
                                    "addresses": [
                                        {
                                            "id": 649,
                                            "location": {
                                                "coordinates": [
                                                    24.9547143,
                                                    60.169587
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Snellmaninkatu 1",
                                            "street_name_sv": "Snellmansgatan 1",
                                            "zip_code": "00170",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Helsingfors trivialskola 1641-1690",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1641,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1690,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/577-545/?format=api",
                                "id": "577-545",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/545/?format=api",
                                    "id": 545,
                                    "neighborhood": "Kruununhaka",
                                    "addresses": [
                                        {
                                            "id": 649,
                                            "location": {
                                                "coordinates": [
                                                    24.9547143,
                                                    60.169587
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Snellmaninkatu 1",
                                            "street_name_sv": "Snellmansgatan 1",
                                            "zip_code": "00170",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1690,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Helsingfors trivialskola 1690-1731",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1690,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1731,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/577-615/?format=api",
                                "id": "577-615",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/615/?format=api",
                                    "id": 615,
                                    "neighborhood": "Kluuvi",
                                    "addresses": [
                                        {
                                            "id": 722,
                                            "location": {
                                                "coordinates": [
                                                    24.9525869,
                                                    60.1691754
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Suurkatu",
                                            "street_name_sv": "Stora gatan",
                                            "zip_code": null,
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1700,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1833,
                                            "comment": "nyk. Aleksanterinkatu",
                                            "approx_begin": true,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 723,
                                            "location": {
                                                "coordinates": [
                                                    24.9532092,
                                                    60.169252
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Aleksanterinkatu",
                                            "street_name_sv": "Alexandersgatan",
                                            "zip_code": null,
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1833,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Suurkatu",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Helsingin triviaalikoulu 1731-1748",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1731,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1748,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/577-546/?format=api",
                                "id": "577-546",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/546/?format=api",
                                    "id": 546,
                                    "neighborhood": "Kruununhaka",
                                    "addresses": [
                                        {
                                            "id": 649,
                                            "location": {
                                                "coordinates": [
                                                    24.9547143,
                                                    60.169587
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Snellmaninkatu 1",
                                            "street_name_sv": "Snellmansgatan 1",
                                            "zip_code": "00170",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1748,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Helsingfors trivialskola 1748-1841",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [],
                                    "photos": [
                                        {
                                            "id": 203,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000007ng&w=1200&h=1200",
                                            "is_front": true
                                        }
                                    ]
                                },
                                "photos": [
                                    {
                                        "id": 203,
                                        "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000007ng&w=1200&h=1200",
                                        "is_front": true
                                    }
                                ],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1748,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1841,
                                "ownership": true,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 620,
                                "owner": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1641,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1841,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 488,
                                "founder": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1487,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1204/?format=api",
                                    "id": 1204,
                                    "surname": "Forsius",
                                    "first_name": "Henrik"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1769,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1782,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1488,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1205/?format=api",
                                    "id": 1205,
                                    "surname": "Melanrtopaeus",
                                    "first_name": "Gabriel"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1768,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1768,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1617,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1295/?format=api",
                                    "id": 1295,
                                    "surname": "Cygnaeus",
                                    "first_name": "Fredrik"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1839,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1841,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1618,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1296/?format=api",
                                    "id": 1296,
                                    "surname": "Brodzenius",
                                    "first_name": "Gustaf"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1705,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1710,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1619,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1297/?format=api",
                                    "id": 1297,
                                    "surname": "Herkepaeus",
                                    "first_name": "Kristoffer"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1725,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1729,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1620,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1298/?format=api",
                                    "id": 1298,
                                    "surname": "Solitander",
                                    "first_name": "Petter"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1782,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1784,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1621,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1299/?format=api",
                                    "id": 1299,
                                    "surname": "Argillander",
                                    "first_name": "Karl Gustaf"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1791,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1804,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1622,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1300/?format=api",
                                    "id": 1300,
                                    "surname": "Brunou",
                                    "first_name": "Karl Henrik"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1785,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1791,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1623,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1301/?format=api",
                                    "id": 1301,
                                    "surname": "Uhlenius",
                                    "first_name": "Zachris"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1814,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1830,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1625,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1302/?format=api",
                                    "id": 1302,
                                    "surname": "Lindormi",
                                    "first_name": "Nils"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1642,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1655,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1626,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1303/?format=api",
                                    "id": 1303,
                                    "surname": "Ignatius",
                                    "first_name": "Anders"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1673,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1686,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1627,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1304/?format=api",
                                    "id": 1304,
                                    "surname": "Martinius",
                                    "first_name": "Matias"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1687,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1687,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1628,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1305/?format=api",
                                    "id": 1305,
                                    "surname": "Kihl",
                                    "first_name": "Georg"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1688,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1697,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1629,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1306/?format=api",
                                    "id": 1306,
                                    "surname": "Wång",
                                    "first_name": "Johan"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1711,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1713,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1630,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1307/?format=api",
                                    "id": 1307,
                                    "surname": "Carstenius",
                                    "first_name": "Abraham"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1701,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1705,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1631,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1308/?format=api",
                                    "id": 1308,
                                    "surname": "Ignatius",
                                    "first_name": "Petter"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1721,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1724,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1632,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1309/?format=api",
                                    "id": 1309,
                                    "surname": "Nicander",
                                    "first_name": "Per"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1697,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1701,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1633,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1310/?format=api",
                                    "id": 1310,
                                    "surname": "Ross",
                                    "first_name": "Isak"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1735,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1738,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1634,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1311/?format=api",
                                    "id": 1311,
                                    "surname": "Krook",
                                    "first_name": "Jonas"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1750,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1759,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1635,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1312/?format=api",
                                    "id": 1312,
                                    "surname": "Kerchström",
                                    "first_name": "Johan"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1784,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1784,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1636,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1313/?format=api",
                                    "id": 1313,
                                    "surname": "Malleen",
                                    "first_name": "Jakob"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1738,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1741,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1637,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1314/?format=api",
                                    "id": 1314,
                                    "surname": "Gråå",
                                    "first_name": "Johan"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1662,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1673,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1638,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1315/?format=api",
                                    "id": 1315,
                                    "surname": "Rothovius",
                                    "first_name": "Matias"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1655,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1661,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1639,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1316/?format=api",
                                    "id": 1316,
                                    "surname": "Löngreen",
                                    "first_name": "Jonas"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1729,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1735,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1640,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1317/?format=api",
                                    "id": 1317,
                                    "surname": "Melartopaeus",
                                    "first_name": "Gabriel"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1760,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1768,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1641,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1318/?format=api",
                                    "id": 1318,
                                    "surname": "Ingman",
                                    "first_name": "Matias"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1804,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1813,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1642,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1319/?format=api",
                                    "id": 1319,
                                    "surname": "Miödh",
                                    "first_name": "Olof"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1741,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1750,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1643,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1320/?format=api",
                                    "id": 1320,
                                    "surname": "Akiander",
                                    "first_name": "Matthias"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1836,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1839,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1644,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1321/?format=api",
                                    "id": 1321,
                                    "surname": "Lindforss",
                                    "first_name": "Arndt Gerhard"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1830,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1835,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            },
                            {
                                "id": 1645,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1322/?format=api",
                                    "id": 1322,
                                    "surname": "Brumerus",
                                    "first_name": "Erik"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1712,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1712,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 577
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Kansallisarkisto",
                                "begin_year": 1724,
                                "end_year": 1977,
                                "arkiston_nimi": "Svenska Normallyceum i Helsingfors -arkiv",
                                "school": 577,
                                "name": null
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "opetuksen tilapäinen keskeyttäminen",
                                "day": null,
                                "month": null,
                                "year": 1713,
                                "decisionmaker": null,
                                "additional_info": "Venäläiset valtaavat kaupungin. Vuonna 1921 koulu jatkuu"
                            },
                            {
                                "description": "opetuksen tilapäinen keskeyttäminen",
                                "day": null,
                                "month": null,
                                "year": 1808,
                                "decisionmaker": null,
                                "additional_info": "Venäjän miehityksen vuoksi keskeytynyt vuoteen 1811"
                            },
                            {
                                "description": "koulun lopettaminen",
                                "day": null,
                                "month": null,
                                "year": 1841,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1641,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": [
                            {
                                "active_school": {
                                    "url": "https://api.hel.fi/kore/v1/school/578/?format=api",
                                    "id": 578,
                                    "names": [
                                        {
                                            "id": 885,
                                            "official_name": "Helsingfors lägre elementarskola",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1841,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1872,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ]
                                },
                                "description": "separates from",
                                "target_school": "https://api.hel.fi/kore/v1/school/577/?format=api",
                                "day": null,
                                "month": null,
                                "year": 1841,
                                "reference": null
                            },
                            {
                                "active_school": {
                                    "url": "https://api.hel.fi/kore/v1/school/579/?format=api",
                                    "id": 579,
                                    "names": [
                                        {
                                            "id": 886,
                                            "official_name": "Helsingfors högre elementarskola",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1841,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1866,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ]
                                },
                                "description": "separates from",
                                "target_school": "https://api.hel.fi/kore/v1/school/577/?format=api",
                                "day": null,
                                "month": null,
                                "year": 1841,
                                "reference": null
                            }
                        ]
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1785,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1791,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1300
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1624/?format=api",
            "id": 1624,
            "surname": "Rosenqvist",
            "first_name": "Oskar August",
            "employers": [
                {
                    "id": 2064,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/656/?format=api",
                        "id": 656,
                        "names": [
                            {
                                "id": 1046,
                                "official_name": "Svenska Handelsinstitutet i Helsingfors",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1915,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1047,
                                "official_name": "Högre Svenska Handelsläroverkets Handelsinstitut",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1915,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1927,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1048,
                                "official_name": "Svenska Handelsinstitutet i Helsingfors",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1927,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1971,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1049,
                                "official_name": "Svenska Handelsinstitutet - Köpmannaläroverket",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1972,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1978,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1176,
                                "official_name": "Svenska Handelsläroverket",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1978,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1996,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 614,
                                "language": "ruotsi",
                                "begin_year": 1911,
                                "end_year": 1996,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 1044,
                                "type": {
                                    "id": 17,
                                    "name": "ammattikoulu",
                                    "description": "Käytännölliseen ammattiin valmistava koulu. Ammattikoulut yleistyivät 1800-luvun lopulla, koulut olivat usein pieniä ja toimivat vain lyhyen aikaa. Peruskoulu-uudistuksen myötä ammattikouluja on yhdistetty suuriksi oppilaitoksiksi."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1996,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 656
                            }
                        ],
                        "fields": [
                            {
                                "id": 121,
                                "field": {
                                    "id": 2,
                                    "name": "Liiketalouden ala"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "approx_begin": false,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1996,
                                "approx_end": false,
                                "reference": null,
                                "main_school": 656
                            }
                        ],
                        "genders": [
                            {
                                "id": 621,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1996,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/656-687/?format=api",
                                "id": "656-687",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/687/?format=api",
                                    "id": 687,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 798,
                                            "location": {
                                                "coordinates": [
                                                    24.9503244,
                                                    60.1660132
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Unioninkatu 20",
                                            "street_name_sv": "Unionsgatan 20",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1819,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1845,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 666,
                                            "owner": {
                                                "id": 637,
                                                "type": "osakeyhtiö",
                                                "name": "Tidnings- och tryckeri AB i Helsingfors"
                                            },
                                            "begin_day": 31,
                                            "begin_month": 3,
                                            "begin_year": 1890,
                                            "end_day": 7,
                                            "end_month": 1,
                                            "end_year": 1918,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1915,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/656-689/?format=api",
                                "id": "656-689",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/689/?format=api",
                                    "id": 689,
                                    "neighborhood": "Ullanlinna",
                                    "addresses": [
                                        {
                                            "id": 800,
                                            "location": {
                                                "coordinates": [
                                                    24.9438679,
                                                    60.1603381
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Jääkärinkatu 11",
                                            "street_name_sv": "Jägaregatan 11",
                                            "zip_code": "00150",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1842,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1930,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 668,
                                            "owner": {
                                                "id": 639,
                                                "type": "osakeyhtiö",
                                                "name": "AOY Metsästäjänkatu 11"
                                            },
                                            "begin_day": 2,
                                            "begin_month": 9,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1931,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/656-690/?format=api",
                                "id": "656-690",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/690/?format=api",
                                    "id": 690,
                                    "neighborhood": "Meilahti",
                                    "addresses": [
                                        {
                                            "id": 801,
                                            "location": {
                                                "coordinates": [
                                                    24.9122754,
                                                    60.1895809
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Topeliuksenkatu 41",
                                            "street_name_sv": "Topeliusgatan 41",
                                            "zip_code": "00250",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1906,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1962,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 669,
                                            "owner": {
                                                "id": 640,
                                                "type": "osakeyhtiö",
                                                "name": "AB Svenska Köpmannaskolan"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": null,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1972,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/656-688/?format=api",
                                "id": "656-688",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/688/?format=api",
                                    "id": 688,
                                    "neighborhood": "Punavuori",
                                    "addresses": [
                                        {
                                            "id": 799,
                                            "location": {
                                                "coordinates": [
                                                    24.9413801,
                                                    60.1618449
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Merimiehenkatu 11",
                                            "street_name_sv": "Sjömansgatan 11",
                                            "zip_code": "00120",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1842,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1915,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 667,
                                            "owner": {
                                                "id": 638,
                                                "type": "osakeyhtiö",
                                                "name": "Högre svenska handelsläroverkets byggnads AB"
                                            },
                                            "begin_day": 20,
                                            "begin_month": 7,
                                            "begin_year": 1914,
                                            "end_day": 1,
                                            "end_month": 6,
                                            "end_year": 1942,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": [
                                        {
                                            "id": 63,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3Akm0000licv&w=1200&h=1200",
                                            "is_front": true
                                        }
                                    ]
                                },
                                "photos": [
                                    {
                                        "id": 63,
                                        "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3Akm0000licv&w=1200&h=1200",
                                        "is_front": true
                                    }
                                ],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1915,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1930,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/656-789/?format=api",
                                "id": "656-789",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/789/?format=api",
                                    "id": 789,
                                    "neighborhood": "Kotkavuori",
                                    "addresses": [
                                        {
                                            "id": 906,
                                            "location": {
                                                "coordinates": [
                                                    24.879071,
                                                    60.156202
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Haahkatie 10",
                                            "street_name_sv": "Ådvägen 10",
                                            "zip_code": "00200",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1951,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1939,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1976,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1996,
                                "ownership": true,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 705,
                                "owner": {
                                    "id": 641,
                                    "type": "osakeyhtiö",
                                    "name": "Högre Svenska Handelsläroverket i Helsingfors AB"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1932,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 706,
                                "owner": {
                                    "id": 642,
                                    "type": "säätiö",
                                    "name": "Stiftelsen Svenska Handelsinstitut i Helsingfors"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1932,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1971,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 707,
                                "owner": {
                                    "id": 643,
                                    "type": "osakeyhtiö",
                                    "name": "Svenska Handelsinstitutet - Köpmannaläroverket aktiebolag"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1972,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 550,
                                "founder": {
                                    "id": 641,
                                    "type": "osakeyhtiö",
                                    "name": "Högre Svenska Handelsläroverket i Helsingfors AB"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 2064,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1624/?format=api",
                                    "id": 1624,
                                    "surname": "Rosenqvist",
                                    "first_name": "Oskar August"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 656
                            },
                            {
                                "id": 2052,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1624/?format=api",
                                    "id": 1624,
                                    "surname": "Rosenqvist",
                                    "first_name": "Oskar August"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 656
                            },
                            {
                                "id": 2053,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1625/?format=api",
                                    "id": 1625,
                                    "surname": "Brock",
                                    "first_name": "Fritz Per Hansson"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1918,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1919,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 656
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": "Lilla Hanken",
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1911,
                                "end_year": 1996,
                                "arkiston_nimi": "Tark!",
                                "school": 656,
                                "name": 1046
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun yhdistäminen toiseen kouluun",
                                "day": null,
                                "month": null,
                                "year": 1972,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1911,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun yhdistäminen toiseen kouluun",
                                "day": null,
                                "month": null,
                                "year": 1996,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [
                            {
                                "active_school": "https://api.hel.fi/kore/v1/school/656/?format=api",
                                "description": "joins",
                                "target_school": {
                                    "url": "https://api.hel.fi/kore/v1/school/672/?format=api",
                                    "id": 672,
                                    "names": [
                                        {
                                            "id": 1088,
                                            "official_name": "Arcada -Nylands Svenska Yrkehögskola",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1996,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ]
                                },
                                "day": null,
                                "month": null,
                                "year": 1996,
                                "reference": null
                            }
                        ],
                        "continuum_target": [
                            {
                                "active_school": {
                                    "url": "https://api.hel.fi/kore/v1/school/657/?format=api",
                                    "id": 657,
                                    "names": [
                                        {
                                            "id": 1050,
                                            "official_name": "Svenska Köpmannaskolan",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1949,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1962,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 1051,
                                            "official_name": "Köpmannaläroverket",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1962,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1971,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ]
                                },
                                "description": "joins",
                                "target_school": "https://api.hel.fi/kore/v1/school/656/?format=api",
                                "day": null,
                                "month": null,
                                "year": 1972,
                                "reference": null
                            }
                        ]
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1911,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1918,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1624
                },
                {
                    "id": 2052,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/656/?format=api",
                        "id": 656,
                        "names": [
                            {
                                "id": 1046,
                                "official_name": "Svenska Handelsinstitutet i Helsingfors",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1915,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1047,
                                "official_name": "Högre Svenska Handelsläroverkets Handelsinstitut",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1915,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1927,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1048,
                                "official_name": "Svenska Handelsinstitutet i Helsingfors",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1927,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1971,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1049,
                                "official_name": "Svenska Handelsinstitutet - Köpmannaläroverket",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1972,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1978,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1176,
                                "official_name": "Svenska Handelsläroverket",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1978,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1996,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 614,
                                "language": "ruotsi",
                                "begin_year": 1911,
                                "end_year": 1996,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 1044,
                                "type": {
                                    "id": 17,
                                    "name": "ammattikoulu",
                                    "description": "Käytännölliseen ammattiin valmistava koulu. Ammattikoulut yleistyivät 1800-luvun lopulla, koulut olivat usein pieniä ja toimivat vain lyhyen aikaa. Peruskoulu-uudistuksen myötä ammattikouluja on yhdistetty suuriksi oppilaitoksiksi."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1996,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 656
                            }
                        ],
                        "fields": [
                            {
                                "id": 121,
                                "field": {
                                    "id": 2,
                                    "name": "Liiketalouden ala"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "approx_begin": false,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1996,
                                "approx_end": false,
                                "reference": null,
                                "main_school": 656
                            }
                        ],
                        "genders": [
                            {
                                "id": 621,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1996,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/656-687/?format=api",
                                "id": "656-687",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/687/?format=api",
                                    "id": 687,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 798,
                                            "location": {
                                                "coordinates": [
                                                    24.9503244,
                                                    60.1660132
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Unioninkatu 20",
                                            "street_name_sv": "Unionsgatan 20",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1819,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1845,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 666,
                                            "owner": {
                                                "id": 637,
                                                "type": "osakeyhtiö",
                                                "name": "Tidnings- och tryckeri AB i Helsingfors"
                                            },
                                            "begin_day": 31,
                                            "begin_month": 3,
                                            "begin_year": 1890,
                                            "end_day": 7,
                                            "end_month": 1,
                                            "end_year": 1918,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1915,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/656-689/?format=api",
                                "id": "656-689",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/689/?format=api",
                                    "id": 689,
                                    "neighborhood": "Ullanlinna",
                                    "addresses": [
                                        {
                                            "id": 800,
                                            "location": {
                                                "coordinates": [
                                                    24.9438679,
                                                    60.1603381
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Jääkärinkatu 11",
                                            "street_name_sv": "Jägaregatan 11",
                                            "zip_code": "00150",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1842,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1930,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 668,
                                            "owner": {
                                                "id": 639,
                                                "type": "osakeyhtiö",
                                                "name": "AOY Metsästäjänkatu 11"
                                            },
                                            "begin_day": 2,
                                            "begin_month": 9,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1931,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/656-690/?format=api",
                                "id": "656-690",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/690/?format=api",
                                    "id": 690,
                                    "neighborhood": "Meilahti",
                                    "addresses": [
                                        {
                                            "id": 801,
                                            "location": {
                                                "coordinates": [
                                                    24.9122754,
                                                    60.1895809
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Topeliuksenkatu 41",
                                            "street_name_sv": "Topeliusgatan 41",
                                            "zip_code": "00250",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1906,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1962,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 669,
                                            "owner": {
                                                "id": 640,
                                                "type": "osakeyhtiö",
                                                "name": "AB Svenska Köpmannaskolan"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": null,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1972,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/656-688/?format=api",
                                "id": "656-688",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/688/?format=api",
                                    "id": 688,
                                    "neighborhood": "Punavuori",
                                    "addresses": [
                                        {
                                            "id": 799,
                                            "location": {
                                                "coordinates": [
                                                    24.9413801,
                                                    60.1618449
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Merimiehenkatu 11",
                                            "street_name_sv": "Sjömansgatan 11",
                                            "zip_code": "00120",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1842,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1915,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 667,
                                            "owner": {
                                                "id": 638,
                                                "type": "osakeyhtiö",
                                                "name": "Högre svenska handelsläroverkets byggnads AB"
                                            },
                                            "begin_day": 20,
                                            "begin_month": 7,
                                            "begin_year": 1914,
                                            "end_day": 1,
                                            "end_month": 6,
                                            "end_year": 1942,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": [
                                        {
                                            "id": 63,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3Akm0000licv&w=1200&h=1200",
                                            "is_front": true
                                        }
                                    ]
                                },
                                "photos": [
                                    {
                                        "id": 63,
                                        "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3Akm0000licv&w=1200&h=1200",
                                        "is_front": true
                                    }
                                ],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1915,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1930,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/656-789/?format=api",
                                "id": "656-789",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/789/?format=api",
                                    "id": 789,
                                    "neighborhood": "Kotkavuori",
                                    "addresses": [
                                        {
                                            "id": 906,
                                            "location": {
                                                "coordinates": [
                                                    24.879071,
                                                    60.156202
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Haahkatie 10",
                                            "street_name_sv": "Ådvägen 10",
                                            "zip_code": "00200",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1951,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1939,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1976,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1996,
                                "ownership": true,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 705,
                                "owner": {
                                    "id": 641,
                                    "type": "osakeyhtiö",
                                    "name": "Högre Svenska Handelsläroverket i Helsingfors AB"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1932,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 706,
                                "owner": {
                                    "id": 642,
                                    "type": "säätiö",
                                    "name": "Stiftelsen Svenska Handelsinstitut i Helsingfors"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1932,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1971,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 707,
                                "owner": {
                                    "id": 643,
                                    "type": "osakeyhtiö",
                                    "name": "Svenska Handelsinstitutet - Köpmannaläroverket aktiebolag"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1972,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 550,
                                "founder": {
                                    "id": 641,
                                    "type": "osakeyhtiö",
                                    "name": "Högre Svenska Handelsläroverket i Helsingfors AB"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 2064,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1624/?format=api",
                                    "id": 1624,
                                    "surname": "Rosenqvist",
                                    "first_name": "Oskar August"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 656
                            },
                            {
                                "id": 2052,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1624/?format=api",
                                    "id": 1624,
                                    "surname": "Rosenqvist",
                                    "first_name": "Oskar August"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1911,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 656
                            },
                            {
                                "id": 2053,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1625/?format=api",
                                    "id": 1625,
                                    "surname": "Brock",
                                    "first_name": "Fritz Per Hansson"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1918,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1919,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 656
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": "Lilla Hanken",
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1911,
                                "end_year": 1996,
                                "arkiston_nimi": "Tark!",
                                "school": 656,
                                "name": 1046
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun yhdistäminen toiseen kouluun",
                                "day": null,
                                "month": null,
                                "year": 1972,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1911,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun yhdistäminen toiseen kouluun",
                                "day": null,
                                "month": null,
                                "year": 1996,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [
                            {
                                "active_school": "https://api.hel.fi/kore/v1/school/656/?format=api",
                                "description": "joins",
                                "target_school": {
                                    "url": "https://api.hel.fi/kore/v1/school/672/?format=api",
                                    "id": 672,
                                    "names": [
                                        {
                                            "id": 1088,
                                            "official_name": "Arcada -Nylands Svenska Yrkehögskola",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1996,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ]
                                },
                                "day": null,
                                "month": null,
                                "year": 1996,
                                "reference": null
                            }
                        ],
                        "continuum_target": [
                            {
                                "active_school": {
                                    "url": "https://api.hel.fi/kore/v1/school/657/?format=api",
                                    "id": 657,
                                    "names": [
                                        {
                                            "id": 1050,
                                            "official_name": "Svenska Köpmannaskolan",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1949,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1962,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 1051,
                                            "official_name": "Köpmannaläroverket",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1962,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1971,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ]
                                },
                                "description": "joins",
                                "target_school": "https://api.hel.fi/kore/v1/school/656/?format=api",
                                "day": null,
                                "month": null,
                                "year": 1972,
                                "reference": null
                            }
                        ]
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1911,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1918,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1624
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1734/?format=api",
            "id": 1734,
            "surname": "Benzelstierna",
            "first_name": "Albert",
            "employers": [
                {
                    "id": 2202,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/620/?format=api",
                        "id": 620,
                        "names": [
                            {
                                "id": 958,
                                "official_name": "Navigationsskolan i Helsingfors",
                                "other_names": [
                                    {
                                        "value": "Helsingin merikoulu",
                                        "type": "epävirallinen nimi"
                                    },
                                    {
                                        "value": "Helsingin seilauskoulu",
                                        "type": "epävirallinen nimi"
                                    }
                                ],
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1825,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 595,
                                "language": "ruotsi",
                                "begin_year": 1828,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 1007,
                                "type": {
                                    "id": 17,
                                    "name": "ammattikoulu",
                                    "description": "Käytännölliseen ammattiin valmistava koulu. Ammattikoulut yleistyivät 1800-luvun lopulla, koulut olivat usein pieniä ja toimivat vain lyhyen aikaa. Peruskoulu-uudistuksen myötä ammattikouluja on yhdistetty suuriksi oppilaitoksiksi."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1828,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 620
                            }
                        ],
                        "fields": [
                            {
                                "id": 84,
                                "field": {
                                    "id": 3,
                                    "name": "Merenkulkuala"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1825,
                                "approx_begin": false,
                                "end_day": null,
                                "end_month": 1,
                                "end_year": 1918,
                                "approx_end": false,
                                "reference": null,
                                "main_school": 620
                            }
                        ],
                        "genders": [
                            {
                                "id": 573,
                                "gender": "poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1828,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/620-469/?format=api",
                                "id": "620-469",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/469/?format=api",
                                    "id": 469,
                                    "neighborhood": "Ullanlinna",
                                    "addresses": [
                                        {
                                            "id": 553,
                                            "location": {
                                                "coordinates": [
                                                    24.9521154,
                                                    60.1605837
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Vuorimiehenkatu 11",
                                            "street_name_sv": "Bergmansgatan 11",
                                            "zip_code": "00140",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1842,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 768,
                                            "location": {
                                                "coordinates": [
                                                    24.9521154,
                                                    60.1605837
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Tähtitorninkatu 12",
                                            "street_name_sv": "Observatoriigatan 12",
                                            "zip_code": "00140",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1892,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Svenska samskola i Helsingfors 1913-1916",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 464,
                                            "owner": {
                                                "id": 362,
                                                "type": "yksityinen",
                                                "name": "Elisabet Krogius"
                                            },
                                            "begin_day": 25,
                                            "begin_month": 1,
                                            "begin_year": 1892,
                                            "end_day": 5,
                                            "end_month": 3,
                                            "end_year": 1916,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 465,
                                            "owner": {
                                                "id": 602,
                                                "type": "yksityinen",
                                                "name": "Lars Thiodolf Krogius"
                                            },
                                            "begin_day": 29,
                                            "begin_month": 10,
                                            "begin_year": 1866,
                                            "end_day": 9,
                                            "end_month": 3,
                                            "end_year": 1890,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1863,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/620-658/?format=api",
                                "id": "620-658",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/658/?format=api",
                                    "id": 658,
                                    "neighborhood": "Kaivopuisto",
                                    "addresses": [
                                        {
                                            "id": 767,
                                            "location": {
                                                "coordinates": [
                                                    24.9563858,
                                                    60.1587811
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Itäinen Puistotie 3",
                                            "street_name_sv": "Östra allén 3",
                                            "zip_code": "00140",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Kaivopuisto 3",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 630,
                                            "owner": {
                                                "id": 601,
                                                "type": "yksityinen",
                                                "name": "Claes Henrik Nyberg"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 4,
                                            "begin_year": 1840,
                                            "end_day": 9,
                                            "end_month": 10,
                                            "end_year": 1883,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1853,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1863,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/620-659/?format=api",
                                "id": "620-659",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/659/?format=api",
                                    "id": 659,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 769,
                                            "location": {
                                                "coordinates": [
                                                    24.9517654,
                                                    60.165924
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Eteläranta 12",
                                            "street_name_sv": "Södra kajen 12",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Läntinen Ranta 12",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1881,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 631,
                                            "owner": {
                                                "id": 603,
                                                "type": "yksityinen",
                                                "name": "Hj. Tammelin ja Väinö Sjöholm"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": null,
                                            "end_day": 7,
                                            "end_month": 5,
                                            "end_year": 1917,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 632,
                                            "owner": {
                                                "id": 604,
                                                "type": "osakeyhtiö",
                                                "name": "Nobels Petroleum Import AB"
                                            },
                                            "begin_day": 7,
                                            "begin_month": 5,
                                            "begin_year": 1917,
                                            "end_day": 17,
                                            "end_month": 3,
                                            "end_year": 1930,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1916,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "ownership": false,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 652,
                                "owner": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "begin_day": 3,
                                "begin_month": 4,
                                "begin_year": 1812,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1864,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 653,
                                "owner": {
                                    "id": 3,
                                    "type": "valtio",
                                    "name": "Suomen valtio"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1864,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 513,
                                "founder": {
                                    "id": 3,
                                    "type": "valtio",
                                    "name": "Suomen valtio"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1806,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1420/?format=api",
                                    "id": 1420,
                                    "surname": "Bergman",
                                    "first_name": "Adam Edvard Konstantin"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1895,
                                "end_day": 14,
                                "end_month": 6,
                                "end_year": 1910,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 1807,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1421/?format=api",
                                    "id": 1421,
                                    "surname": "Ekholm",
                                    "first_name": "Alfred"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1910,
                                "end_day": 15,
                                "end_month": 11,
                                "end_year": 1910,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 1808,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1422/?format=api",
                                    "id": 1422,
                                    "surname": "Forssell",
                                    "first_name": "Carl Evert"
                                },
                                "begin_day": 15,
                                "begin_month": 11,
                                "begin_year": 1910,
                                "end_day": 1,
                                "end_month": 12,
                                "end_year": 1910,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 1809,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1423/?format=api",
                                    "id": 1423,
                                    "surname": "Lindholm",
                                    "first_name": "Johan Gottfried"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1910,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 1937,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1528/?format=api",
                                    "id": 1528,
                                    "surname": "Nyberg",
                                    "first_name": "Claes Henrik"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1854,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1863,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 1938,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1529/?format=api",
                                    "id": 1529,
                                    "surname": "Krogius",
                                    "first_name": "Lars Thiodolf"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1864,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1889,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2201,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1733/?format=api",
                                    "id": 1733,
                                    "surname": "Kocke",
                                    "first_name": "Anders"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1817,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1825,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2202,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1734/?format=api",
                                    "id": 1734,
                                    "surname": "Benzelstierna",
                                    "first_name": "Albert"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1830,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1833,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2203,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1735/?format=api",
                                    "id": 1735,
                                    "surname": "Ingeström",
                                    "first_name": "E. A."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1834,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1845,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2204,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1736/?format=api",
                                    "id": 1736,
                                    "surname": "Lönneström",
                                    "first_name": "Constantin"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1846,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1848,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2206,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1738/?format=api",
                                    "id": 1738,
                                    "surname": "Pontan",
                                    "first_name": "Johan Adolf"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1889,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1891,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2207,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1739/?format=api",
                                    "id": 1739,
                                    "surname": "Johansson",
                                    "first_name": "Bror Anton Waldemar"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1892,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1894,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2208,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1740/?format=api",
                                    "id": 1740,
                                    "surname": "Hjelt",
                                    "first_name": "K. T."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1894,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Kansallisarkisto",
                                "begin_year": 1812,
                                "end_year": 1919,
                                "arkiston_nimi": "Navigationsskolans i Helsingfors arkiv",
                                "school": 620,
                                "name": null
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun lakkauttaminen",
                                "day": null,
                                "month": 1,
                                "year": 1918,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": 3,
                                "month": 4,
                                "year": 1812,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulutoiminan aloittaminen",
                                "day": null,
                                "month": null,
                                "year": 1825,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1830,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1833,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1734
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1236/?format=api",
            "id": 1236,
            "surname": "Pantsar",
            "first_name": "H.",
            "employers": [
                {
                    "id": 1527,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/591/?format=api",
                        "id": 591,
                        "names": [
                            {
                                "id": 904,
                                "official_name": "Käsityöläisten iltakoulu",
                                "other_names": [
                                    {
                                        "value": "Hantverkarnas kvällskola",
                                        "type": "ruotsinkielinen nimi"
                                    }
                                ],
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1868,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1885,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 578,
                                "language": "ruotsi",
                                "begin_year": 1868,
                                "end_year": 1887,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 976,
                                "type": {
                                    "id": 17,
                                    "name": "ammattikoulu",
                                    "description": "Käytännölliseen ammattiin valmistava koulu. Ammattikoulut yleistyivät 1800-luvun lopulla, koulut olivat usein pieniä ja toimivat vain lyhyen aikaa. Peruskoulu-uudistuksen myötä ammattikouluja on yhdistetty suuriksi oppilaitoksiksi."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1868,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1885,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 591
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 487,
                                "gender": "poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1868,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1887,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/591-557/?format=api",
                                "id": "591-557",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/557/?format=api",
                                    "id": 557,
                                    "neighborhood": "Kluuvi",
                                    "addresses": [
                                        {
                                            "id": 663,
                                            "location": {
                                                "coordinates": [
                                                    24.9435114,
                                                    60.1686941
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Aleksanterinkatu 50",
                                            "street_name_sv": "Alexandersgatan 50",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1833,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1846,
                                    "architect": "Gustaf Leander",
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Iltakoulu 1868-1887",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 544,
                                            "owner": {
                                                "id": 489,
                                                "type": "yksityinen",
                                                "name": "Jonas Lithonius"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1846,
                                            "end_day": 26,
                                            "end_month": 5,
                                            "end_year": 1917,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1868,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1887,
                                "ownership": false,
                                "reference": null
                            }
                        ],
                        "owners": [],
                        "founders": [],
                        "principals": [
                            {
                                "id": 1527,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1236/?format=api",
                                    "id": 1236,
                                    "surname": "Pantsar",
                                    "first_name": "H."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1868,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1887,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 591
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1868,
                                "end_year": 1885,
                                "arkiston_nimi": null,
                                "school": 591,
                                "name": 904
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1858,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun lakkauttaminen",
                                "day": null,
                                "month": null,
                                "year": 1885,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1868,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1887,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1236
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/462/?format=api",
            "id": 462,
            "surname": "Sevon",
            "first_name": "Aline",
            "employers": [
                {
                    "id": 493,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/81/?format=api",
                        "id": 81,
                        "names": [
                            {
                                "id": 44,
                                "official_name": "Kårböle lågstadieskola",
                                "other_names": null,
                                "begin_day": 1,
                                "begin_month": 8,
                                "begin_year": 1977,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 580,
                                "official_name": "Kårböle folkskola",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1896,
                                "end_day": 31,
                                "end_month": 7,
                                "end_year": 1977,
                                "reference": "tarkasta nimen tarkka alkuvuosi, koulu aloittitoiminnan yksityisenä 1896",
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 425,
                                "language": "ruotsi",
                                "begin_year": 1896,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 191,
                                "type": {
                                    "id": 1,
                                    "name": "kansakoulu",
                                    "description": "1858-1977 6 lk, maksuton perusopetusta antava koulu. Vuoden 1866 kansakouluasetuksesta lähtien kaupungeissa asuville 8–14-vuotiaille lapsille tuli tarjota perusopetusta. Kansakoulusta saattoi hakea oppikouluun ja ammattikouluun."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1896,
                                "end_day": 31,
                                "end_month": 7,
                                "end_year": 1977,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 81
                            },
                            {
                                "id": 192,
                                "type": {
                                    "id": 2,
                                    "name": "alakansakoulu",
                                    "description": "1867-1958 Kansakoulun kaksi ensimmäistä vuosiluokkaa, jossa annettiin alkeisopetusta. Vuodesta 1958 peruskoulu-uudistukseen 1977 asti kansakoulu oli yhtenäinen, eikä sitä enää jaettu ala- ja yläkansakouluun."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1904,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1958,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 81
                            },
                            {
                                "id": 193,
                                "type": {
                                    "id": 3,
                                    "name": "yläkansakoulu",
                                    "description": "1869-1958, 4 lk. Kansakoulun 3. - 6. luokka joissa annettiin yleisivistävää opetusta. Vuodesta 1921 lähtien yläkansakoulussa annettiin oppivelvollisuusopetusta. Vuonna 1958 erillisistä ylä- ja alakansakouluista muodostettiin yhtenäisiä kansakouluja."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1896,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1958,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 31
                            },
                            {
                                "id": 194,
                                "type": {
                                    "id": 8,
                                    "name": "ala-aste",
                                    "description": "1977-1999 Peruskoulun 1-6 vuosiluokka. 1999 lähtien peruskoulussa ei ole ollut jakoa ala- ja yläasteeseen. Vuodesta 1999 lähtien virallinen termi on ollut alakoulu, mutta myös muotoa peruskoulun ala-asteen koulu käytetään."
                                },
                                "begin_day": 1,
                                "begin_month": 8,
                                "begin_year": 1977,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 81
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 229,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1896,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 261,
                                "number": 4,
                                "begin_day": 1,
                                "begin_month": 8,
                                "begin_year": 1977,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": "lukuvuonna 2011-2012 6 luokka-astetta",
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 442,
                                "number": 6,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1904,
                                "end_day": 31,
                                "end_month": 7,
                                "end_year": 1977,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 476,
                                "number": 4,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1896,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1904,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 695,
                                "number": 6,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": null,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/81-62/?format=api",
                                "id": "81-62",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/62/?format=api",
                                    "id": 62,
                                    "neighborhood": "Kannelmäki",
                                    "addresses": [
                                        {
                                            "id": 53,
                                            "location": {
                                                "coordinates": [
                                                    24.8820782,
                                                    60.2415788
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Kanneltie 1",
                                            "street_name_sv": "Kantelevägen 1",
                                            "zip_code": "00420",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1957,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1961,
                                    "architect": "K. Haglund, E. Koiso-Kanttila",
                                    "architect_firm": "HKR",
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Kannelmäen ala-aste, peruskoulu",
                                    "reference": "Opintiellä",
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 64,
                                            "owner": {
                                                "id": 1,
                                                "type": "kunta",
                                                "name": "Helsingin kaupunki"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1961,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": [
                                        {
                                            "id": 126,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000004co&w=1200&h=1200",
                                            "is_front": false
                                        },
                                        {
                                            "id": 129,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A00000vuh&w=1200&h=1200",
                                            "is_front": true
                                        },
                                        {
                                            "id": 167,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000004cm&w=1200&h=1200",
                                            "is_front": true
                                        },
                                        {
                                            "id": 19,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000004cm&w=1200&h=1200",
                                            "is_front": true
                                        },
                                        {
                                            "id": 20,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A00000vuh&w=1200&h=1200",
                                            "is_front": false
                                        }
                                    ]
                                },
                                "photos": [
                                    {
                                        "id": 19,
                                        "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000004cm&w=1200&h=1200",
                                        "is_front": true
                                    },
                                    {
                                        "id": 20,
                                        "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A00000vuh&w=1200&h=1200",
                                        "is_front": false
                                    }
                                ],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1962,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "ownership": true,
                                "reference": "tarkasta milloin käyttö alkoi"
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/81-79/?format=api",
                                "id": "81-79",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/79/?format=api",
                                    "id": 79,
                                    "neighborhood": "Kaarela",
                                    "addresses": [
                                        {
                                            "id": 69,
                                            "location": {
                                                "coordinates": [
                                                    24.8695407,
                                                    60.2528671
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Sorolantie 2",
                                            "street_name_sv": "Sorolavägen 2",
                                            "zip_code": "00420",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1976,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Kalannintie 64",
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 241,
                                            "location": {
                                                "coordinates": [
                                                    24.8698247,
                                                    60.2527481
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Kalannintie 64",
                                            "street_name_sv": "Kalantivägen 64",
                                            "zip_code": "00420",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1957,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1976,
                                            "comment": "nyk. Sorolantie 2",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1894,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Kårböle, Kaarela olisi selkeämpi kaupunginosa",
                                    "reference": "Opintiellä",
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 76,
                                            "owner": {
                                                "id": 1,
                                                "type": "kunta",
                                                "name": "Helsingin kaupunki"
                                            },
                                            "begin_day": 1,
                                            "begin_month": 1,
                                            "begin_year": 1946,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 77,
                                            "owner": {
                                                "id": 85,
                                                "type": "kunta",
                                                "name": "Helsingin maalaiskunta"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1896,
                                            "end_day": 31,
                                            "end_month": 12,
                                            "end_year": 1945,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1896,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "ownership": true,
                                "reference": "uudisrakennus 1993"
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/81-235/?format=api",
                                "id": "81-235",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/235/?format=api",
                                    "id": 235,
                                    "neighborhood": "Kaarela",
                                    "addresses": [
                                        {
                                            "id": 69,
                                            "location": {
                                                "coordinates": [
                                                    24.8695407,
                                                    60.2528671
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Sorolantie 2",
                                            "street_name_sv": "Sorolavägen 2",
                                            "zip_code": "00420",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1976,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Kalannintie 64",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1993,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Kårböle",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 222,
                                            "owner": {
                                                "id": 1,
                                                "type": "kunta",
                                                "name": "Helsingin kaupunki"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1993,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1994,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "ownership": true,
                                "reference": "Kouluviraston toimintakertomus 1994"
                            }
                        ],
                        "owners": [
                            {
                                "id": 107,
                                "owner": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "begin_day": 1,
                                "begin_month": 1,
                                "begin_year": 1946,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 108,
                                "owner": {
                                    "id": 85,
                                    "type": "kunta",
                                    "name": "Helsingin maalaiskunta"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1896,
                                "end_day": 31,
                                "end_month": 12,
                                "end_year": 1945,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 84,
                                "founder": {
                                    "id": 85,
                                    "type": "kunta",
                                    "name": "Helsingin maalaiskunta"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 493,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/462/?format=api",
                                    "id": 462,
                                    "surname": "Sevon",
                                    "first_name": "Aline"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1896,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1907,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 81
                            },
                            {
                                "id": 494,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/463/?format=api",
                                    "id": 463,
                                    "surname": "Jernström",
                                    "first_name": "Agnes"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1907,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1917,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 81
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Koulu",
                                "begin_year": 1973,
                                "end_year": null,
                                "arkiston_nimi": "Kårböle lågstadieskola",
                                "school": 81,
                                "name": 44
                            },
                            {
                                "url": "https://yksa3.darchive.fi/YKSA3/id/139879414955600",
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Helsingin kaupunginarkisto",
                                "begin_year": 1899,
                                "end_year": 1973,
                                "arkiston_nimi": "Kårböle folkskola",
                                "school": 81,
                                "name": 580
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1896,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1896,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1907,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 462
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1056/?format=api",
            "id": 1056,
            "surname": "Forsman",
            "first_name": "Aline",
            "employers": [
                {
                    "id": 1310,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/542/?format=api",
                        "id": 542,
                        "names": [
                            {
                                "id": 836,
                                "official_name": "Aina Tavaststjernas småbarnskola",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1879,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 887,
                                "official_name": "Aline Forsmans förberedande skola",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1900,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 551,
                                "language": "ruotsi",
                                "begin_year": 1879,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 918,
                                "type": {
                                    "id": 12,
                                    "name": "valmistava koulu",
                                    "description": "1870- 1977 Yksityinen kansakoulun alimpien luokkien kanssa rinnakkainen koulu, josta pyrittiin oppikouluun. Valmistavat koulut olivat usein pieniä ja eniten niitä oli Helsingissä 1900-luvun alkuvuosikymmeninä."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1879,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 542
                            },
                            {
                                "id": 919,
                                "type": {
                                    "id": 19,
                                    "name": "sivukoulu",
                                    "description": "Koululla useampia toimipisteitä? Onko tätä termiä käytetty ennen peruskoulua? Koulutyyppi puuttuu peruskouluilta joilla on sivukouluja esim. Aurinkolahden peruskoulun sivukoulut aurinkopilkku ja Kanava."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1879,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 366
                            }
                        ],
                        "fields": [],
                        "genders": [
                            {
                                "id": 428,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1879,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [
                            {
                                "id": 600,
                                "number": 2,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1879,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/542-279/?format=api",
                                "id": "542-279",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/279/?format=api",
                                    "id": 279,
                                    "neighborhood": "Kruununhaka",
                                    "addresses": [
                                        {
                                            "id": 305,
                                            "location": {
                                                "coordinates": [
                                                    24.9473362,
                                                    60.1699676
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Hallituskatu 15",
                                            "street_name_sv": "Regeringsgatan 15",
                                            "zip_code": null,
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1836,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1995,
                                            "comment": "nyk. Yliopistonkatu 5",
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 573,
                                            "location": {
                                                "coordinates": [
                                                    24.9469317,
                                                    60.1700419
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Yliopistonkatu 5",
                                            "street_name_sv": "Universitetsgatan 5",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1995,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Hallituskatu 15",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1887,
                                    "architect": "Gustaf Nyström",
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Annegatans f:n vuokrat. 1916-1919",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 265,
                                            "owner": {
                                                "id": 83,
                                                "type": "muu",
                                                "name": "Helsingin yliopisto"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1887,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 266,
                                            "owner": {
                                                "id": 581,
                                                "type": "osakeyhtiö",
                                                "name": "OY Hallituskatu 15"
                                            },
                                            "begin_day": 2,
                                            "begin_month": 8,
                                            "begin_year": 1909,
                                            "end_day": 16,
                                            "end_month": 1,
                                            "end_year": 1933,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1900,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1904,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/542-436/?format=api",
                                "id": "542-436",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/436/?format=api",
                                    "id": 436,
                                    "neighborhood": "Kamppi",
                                    "addresses": [
                                        {
                                            "id": 513,
                                            "location": {
                                                "coordinates": [
                                                    24.9378075,
                                                    60.1654335
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Annankatu 18",
                                            "street_name_sv": "Annegatan 18",
                                            "zip_code": "00120",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1836,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1871,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Nya svenska småbarnskola vuokrat. 1910-1916",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 417,
                                            "owner": {
                                                "id": 288,
                                                "type": "osakeyhtiö",
                                                "name": "AB F. Tilgmann Oy"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1871,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1908,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/542-474/?format=api",
                                "id": "542-474",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/474/?format=api",
                                    "id": 474,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 561,
                                            "location": {
                                                "coordinates": [
                                                    24.9464522,
                                                    60.1658322
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Rikhardinkatu 4",
                                            "street_name_sv": "Richardsgatan 4",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Aina Tavaststjernas småbarsskola 1879-1889",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 471,
                                            "owner": {
                                                "id": 373,
                                                "type": "yksityinen",
                                                "name": "Matts Kihlgren"
                                            },
                                            "begin_day": 23,
                                            "begin_month": 2,
                                            "begin_year": 1863,
                                            "end_day": 1,
                                            "end_month": 11,
                                            "end_year": 1885,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 472,
                                            "owner": {
                                                "id": 374,
                                                "type": "yksityinen",
                                                "name": "Matts Kihlgrens barn"
                                            },
                                            "begin_day": 2,
                                            "begin_month": 11,
                                            "begin_year": 1885,
                                            "end_day": 30,
                                            "end_month": 1,
                                            "end_year": 1887,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 473,
                                            "owner": {
                                                "id": 375,
                                                "type": "yksityinen",
                                                "name": "Grigorij Sergejeff"
                                            },
                                            "begin_day": 31,
                                            "begin_month": 1,
                                            "begin_year": 1887,
                                            "end_day": 26,
                                            "end_month": 1,
                                            "end_year": 1890,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 474,
                                            "owner": {
                                                "id": 471,
                                                "type": "yksityinen",
                                                "name": "Salomon Jansson"
                                            },
                                            "begin_day": 28,
                                            "begin_month": 2,
                                            "begin_year": 1836,
                                            "end_day": 22,
                                            "end_month": 2,
                                            "end_year": 1863,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1879,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1889,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/542-475/?format=api",
                                "id": "542-475",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/475/?format=api",
                                    "id": 475,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 300,
                                            "location": {
                                                "coordinates": [
                                                    24.9462886,
                                                    60.1667745
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Korkeavuorenkatu 47",
                                            "street_name_sv": "Högbergsgatan 47",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 746,
                                            "location": {
                                                "coordinates": [
                                                    24.9462886,
                                                    60.1667745
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Eteläesplanadi 18",
                                            "street_name_sv": "Södra esplanaden 18",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Aina Tavaststjernas småbarsskola 1889-1894, Suomen liikemiesten kauppaopisto 1900-1907",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 475,
                                            "owner": {
                                                "id": 273,
                                                "type": "yksityinen",
                                                "name": "Frans Oscar Liewendal"
                                            },
                                            "begin_day": 27,
                                            "begin_month": 10,
                                            "begin_year": 1851,
                                            "end_day": 18,
                                            "end_month": 12,
                                            "end_year": 1898,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 476,
                                            "owner": {
                                                "id": 558,
                                                "type": "yksityinen",
                                                "name": "Gust. Rud. Liewendal & Edv. Jul. Liewendal"
                                            },
                                            "begin_day": 27,
                                            "begin_month": 2,
                                            "begin_year": 1899,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1928,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": [
                                        {
                                            "id": 38,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000000a3&w=1200&h=1200",
                                            "is_front": true
                                        }
                                    ]
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1889,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1894,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/542-476/?format=api",
                                "id": "542-476",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/476/?format=api",
                                    "id": 476,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 562,
                                            "location": {
                                                "coordinates": [
                                                    24.9453739,
                                                    60.1643957
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Pieni Roobertinkatu 9",
                                            "street_name_sv": "Lilla Robertsgatan 9",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Aina Tavaststjernas småbarsskola 1894-1900",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 477,
                                            "owner": {
                                                "id": 377,
                                                "type": "yksityinen",
                                                "name": "Alexander Gratschoff"
                                            },
                                            "begin_day": 18,
                                            "begin_month": 2,
                                            "begin_year": 1889,
                                            "end_day": 20,
                                            "end_month": 7,
                                            "end_year": 1907,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1894,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/542-477/?format=api",
                                "id": "542-477",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/477/?format=api",
                                    "id": 477,
                                    "neighborhood": "Kruununhaka",
                                    "addresses": [
                                        {
                                            "id": 563,
                                            "location": {
                                                "coordinates": [
                                                    24.9551634,
                                                    60.1704667
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Hallituskatu 3",
                                            "street_name_sv": "Regeringsgatan 3",
                                            "zip_code": "00170",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1836,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1995,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1844,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Aina Tavaststjernas småbarsskola 1904-1910",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 478,
                                            "owner": {
                                                "id": 378,
                                                "type": "yksityinen",
                                                "name": "Sophie von Willebrand"
                                            },
                                            "begin_day": 3,
                                            "begin_month": 10,
                                            "begin_year": 1904,
                                            "end_day": 20,
                                            "end_month": 3,
                                            "end_year": 1910,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1904,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1908,
                                "ownership": false,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 580,
                                "owner": {
                                    "id": 96,
                                    "type": "yksityinen",
                                    "name": "H. Tavastsjerna"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1879,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 581,
                                "owner": {
                                    "id": 97,
                                    "type": "yksityinen",
                                    "name": "H.K. Forsman"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1900,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1910,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 582,
                                "owner": {
                                    "id": 98,
                                    "type": "yksityinen",
                                    "name": "E.M. Hornborg"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1910,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1914,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 583,
                                "owner": {
                                    "id": 99,
                                    "type": "säätiö",
                                    "name": "Stiftelsen nya svenska flickskolan"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1914,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 459,
                                "founder": {
                                    "id": 372,
                                    "type": "yksityinen",
                                    "name": "Aina Tavaststjerna"
                                },
                                "reference": null
                            },
                            {
                                "id": 460,
                                "founder": {
                                    "id": 379,
                                    "type": "yksityinen",
                                    "name": "Hilja Tavaststjerna"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1308,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/488/?format=api",
                                    "id": 488,
                                    "surname": "Tavastsjerna",
                                    "first_name": "Hilja"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1879,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1900,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 542
                            },
                            {
                                "id": 1309,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/489/?format=api",
                                    "id": 489,
                                    "surname": "Forsman",
                                    "first_name": "Helena"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1909,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 542
                            },
                            {
                                "id": 1310,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1056/?format=api",
                                    "id": 1056,
                                    "surname": "Forsman",
                                    "first_name": "Aline"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1900,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1909,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 542
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1900,
                                "end_year": 1916,
                                "arkiston_nimi": null,
                                "school": 542,
                                "name": 887
                            },
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Tuntematon",
                                "begin_year": 1879,
                                "end_year": 1900,
                                "arkiston_nimi": null,
                                "school": 542,
                                "name": 836
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1879,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1900,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1909,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1056
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1739/?format=api",
            "id": 1739,
            "surname": "Johansson",
            "first_name": "Bror Anton Waldemar",
            "employers": [
                {
                    "id": 2207,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/620/?format=api",
                        "id": 620,
                        "names": [
                            {
                                "id": 958,
                                "official_name": "Navigationsskolan i Helsingfors",
                                "other_names": [
                                    {
                                        "value": "Helsingin merikoulu",
                                        "type": "epävirallinen nimi"
                                    },
                                    {
                                        "value": "Helsingin seilauskoulu",
                                        "type": "epävirallinen nimi"
                                    }
                                ],
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1825,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 595,
                                "language": "ruotsi",
                                "begin_year": 1828,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 1007,
                                "type": {
                                    "id": 17,
                                    "name": "ammattikoulu",
                                    "description": "Käytännölliseen ammattiin valmistava koulu. Ammattikoulut yleistyivät 1800-luvun lopulla, koulut olivat usein pieniä ja toimivat vain lyhyen aikaa. Peruskoulu-uudistuksen myötä ammattikouluja on yhdistetty suuriksi oppilaitoksiksi."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1828,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 620
                            }
                        ],
                        "fields": [
                            {
                                "id": 84,
                                "field": {
                                    "id": 3,
                                    "name": "Merenkulkuala"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1825,
                                "approx_begin": false,
                                "end_day": null,
                                "end_month": 1,
                                "end_year": 1918,
                                "approx_end": false,
                                "reference": null,
                                "main_school": 620
                            }
                        ],
                        "genders": [
                            {
                                "id": 573,
                                "gender": "poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1828,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/620-469/?format=api",
                                "id": "620-469",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/469/?format=api",
                                    "id": 469,
                                    "neighborhood": "Ullanlinna",
                                    "addresses": [
                                        {
                                            "id": 553,
                                            "location": {
                                                "coordinates": [
                                                    24.9521154,
                                                    60.1605837
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Vuorimiehenkatu 11",
                                            "street_name_sv": "Bergmansgatan 11",
                                            "zip_code": "00140",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1842,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 768,
                                            "location": {
                                                "coordinates": [
                                                    24.9521154,
                                                    60.1605837
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Tähtitorninkatu 12",
                                            "street_name_sv": "Observatoriigatan 12",
                                            "zip_code": "00140",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1892,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Svenska samskola i Helsingfors 1913-1916",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 464,
                                            "owner": {
                                                "id": 362,
                                                "type": "yksityinen",
                                                "name": "Elisabet Krogius"
                                            },
                                            "begin_day": 25,
                                            "begin_month": 1,
                                            "begin_year": 1892,
                                            "end_day": 5,
                                            "end_month": 3,
                                            "end_year": 1916,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 465,
                                            "owner": {
                                                "id": 602,
                                                "type": "yksityinen",
                                                "name": "Lars Thiodolf Krogius"
                                            },
                                            "begin_day": 29,
                                            "begin_month": 10,
                                            "begin_year": 1866,
                                            "end_day": 9,
                                            "end_month": 3,
                                            "end_year": 1890,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1863,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1916,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/620-658/?format=api",
                                "id": "620-658",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/658/?format=api",
                                    "id": 658,
                                    "neighborhood": "Kaivopuisto",
                                    "addresses": [
                                        {
                                            "id": 767,
                                            "location": {
                                                "coordinates": [
                                                    24.9563858,
                                                    60.1587811
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Itäinen Puistotie 3",
                                            "street_name_sv": "Östra allén 3",
                                            "zip_code": "00140",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Kaivopuisto 3",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 630,
                                            "owner": {
                                                "id": 601,
                                                "type": "yksityinen",
                                                "name": "Claes Henrik Nyberg"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 4,
                                            "begin_year": 1840,
                                            "end_day": 9,
                                            "end_month": 10,
                                            "end_year": 1883,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1853,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1863,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/620-659/?format=api",
                                "id": "620-659",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/659/?format=api",
                                    "id": 659,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 769,
                                            "location": {
                                                "coordinates": [
                                                    24.9517654,
                                                    60.165924
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Eteläranta 12",
                                            "street_name_sv": "Södra kajen 12",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": "ent. Läntinen Ranta 12",
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1881,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": null,
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 631,
                                            "owner": {
                                                "id": 603,
                                                "type": "yksityinen",
                                                "name": "Hj. Tammelin ja Väinö Sjöholm"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": null,
                                            "end_day": 7,
                                            "end_month": 5,
                                            "end_year": 1917,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 632,
                                            "owner": {
                                                "id": 604,
                                                "type": "osakeyhtiö",
                                                "name": "Nobels Petroleum Import AB"
                                            },
                                            "begin_day": 7,
                                            "begin_month": 5,
                                            "begin_year": 1917,
                                            "end_day": 17,
                                            "end_month": 3,
                                            "end_year": 1930,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1916,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "ownership": false,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 652,
                                "owner": {
                                    "id": 1,
                                    "type": "kunta",
                                    "name": "Helsingin kaupunki"
                                },
                                "begin_day": 3,
                                "begin_month": 4,
                                "begin_year": 1812,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1864,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 653,
                                "owner": {
                                    "id": 3,
                                    "type": "valtio",
                                    "name": "Suomen valtio"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1864,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 513,
                                "founder": {
                                    "id": 3,
                                    "type": "valtio",
                                    "name": "Suomen valtio"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1806,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1420/?format=api",
                                    "id": 1420,
                                    "surname": "Bergman",
                                    "first_name": "Adam Edvard Konstantin"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1895,
                                "end_day": 14,
                                "end_month": 6,
                                "end_year": 1910,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 1807,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1421/?format=api",
                                    "id": 1421,
                                    "surname": "Ekholm",
                                    "first_name": "Alfred"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1910,
                                "end_day": 15,
                                "end_month": 11,
                                "end_year": 1910,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 1808,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1422/?format=api",
                                    "id": 1422,
                                    "surname": "Forssell",
                                    "first_name": "Carl Evert"
                                },
                                "begin_day": 15,
                                "begin_month": 11,
                                "begin_year": 1910,
                                "end_day": 1,
                                "end_month": 12,
                                "end_year": 1910,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 1809,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1423/?format=api",
                                    "id": 1423,
                                    "surname": "Lindholm",
                                    "first_name": "Johan Gottfried"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1910,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1918,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 1937,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1528/?format=api",
                                    "id": 1528,
                                    "surname": "Nyberg",
                                    "first_name": "Claes Henrik"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1854,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1863,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 1938,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1529/?format=api",
                                    "id": 1529,
                                    "surname": "Krogius",
                                    "first_name": "Lars Thiodolf"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1864,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1889,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2201,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1733/?format=api",
                                    "id": 1733,
                                    "surname": "Kocke",
                                    "first_name": "Anders"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1817,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1825,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2202,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1734/?format=api",
                                    "id": 1734,
                                    "surname": "Benzelstierna",
                                    "first_name": "Albert"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1830,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1833,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2203,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1735/?format=api",
                                    "id": 1735,
                                    "surname": "Ingeström",
                                    "first_name": "E. A."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1834,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1845,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2204,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1736/?format=api",
                                    "id": 1736,
                                    "surname": "Lönneström",
                                    "first_name": "Constantin"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1846,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1848,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2206,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1738/?format=api",
                                    "id": 1738,
                                    "surname": "Pontan",
                                    "first_name": "Johan Adolf"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1889,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1891,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2207,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1739/?format=api",
                                    "id": 1739,
                                    "surname": "Johansson",
                                    "first_name": "Bror Anton Waldemar"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1892,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1894,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            },
                            {
                                "id": 2208,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1740/?format=api",
                                    "id": 1740,
                                    "surname": "Hjelt",
                                    "first_name": "K. T."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1894,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1895,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 620
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Kansallisarkisto",
                                "begin_year": 1812,
                                "end_year": 1919,
                                "arkiston_nimi": "Navigationsskolans i Helsingfors arkiv",
                                "school": 620,
                                "name": null
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun lakkauttaminen",
                                "day": null,
                                "month": 1,
                                "year": 1918,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulun perustaminen",
                                "day": 3,
                                "month": 4,
                                "year": 1812,
                                "decisionmaker": null,
                                "additional_info": null
                            },
                            {
                                "description": "koulutoiminan aloittaminen",
                                "day": null,
                                "month": null,
                                "year": 1825,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [],
                        "continuum_target": []
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1892,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1894,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1739
                }
            ]
        },
        {
            "url": "https://api.hel.fi/kore/v1/principal/1412/?format=api",
            "id": 1412,
            "surname": "Brofeldt",
            "first_name": "Kaarlo",
            "employers": [
                {
                    "id": 1798,
                    "school": {
                        "url": "https://api.hel.fi/kore/v1/school/619/?format=api",
                        "id": 619,
                        "names": [
                            {
                                "id": 957,
                                "official_name": "Suomen liikemiesten kauppaopisto",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1898,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1999,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1174,
                                "official_name": "Suomen Liikemiesten Kauppaopisto - Atk-Instituutti",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1999,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 2009,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 1175,
                                "official_name": "Suomen Liikemiesten Kauppaopisto",
                                "other_names": null,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 2009,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "languages": [
                            {
                                "id": 339,
                                "language": "suomi",
                                "begin_year": 1898,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "types": [
                            {
                                "id": 1006,
                                "type": {
                                    "id": 17,
                                    "name": "ammattikoulu",
                                    "description": "Käytännölliseen ammattiin valmistava koulu. Ammattikoulut yleistyivät 1800-luvun lopulla, koulut olivat usein pieniä ja toimivat vain lyhyen aikaa. Peruskoulu-uudistuksen myötä ammattikouluja on yhdistetty suuriksi oppilaitoksiksi."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1898,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "main_school": 619
                            }
                        ],
                        "fields": [
                            {
                                "id": 83,
                                "field": {
                                    "id": 2,
                                    "name": "Liiketalouden ala"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1898,
                                "approx_begin": false,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "approx_end": false,
                                "reference": null,
                                "main_school": 619
                            }
                        ],
                        "genders": [
                            {
                                "id": 572,
                                "gender": "tyttö- ja poikakoulu",
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1898,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "grade_counts": [],
                        "buildings": [
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/619-405/?format=api",
                                "id": "619-405",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/405/?format=api",
                                    "id": 405,
                                    "neighborhood": "Kluuvi",
                                    "addresses": [
                                        {
                                            "id": 474,
                                            "location": {
                                                "coordinates": [
                                                    24.9459973,
                                                    60.1686323
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Aleksanterinkatu 44",
                                            "street_name_sv": "Alexandersgatan 44",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1833,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 475,
                                            "location": {
                                                "coordinates": [
                                                    24.9459973,
                                                    60.1686323
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Mikonkatu 3",
                                            "street_name_sv": "Mikaelsgatan 3",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1901,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Förskolan till realskolan vuokrat. 1875-1895, Suomen liikemiesten kauppaopisto 1898-1899",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 376,
                                            "owner": {
                                                "id": 1,
                                                "type": "kunta",
                                                "name": "Helsingin kaupunki"
                                            },
                                            "begin_day": 1,
                                            "begin_month": 8,
                                            "begin_year": 1977,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 377,
                                            "owner": {
                                                "id": 242,
                                                "type": "yksityinen",
                                                "name": "Ulrik Palmu"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 12,
                                            "begin_year": 1862,
                                            "end_day": 16,
                                            "end_month": 3,
                                            "end_year": 1890,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 378,
                                            "owner": {
                                                "id": 243,
                                                "type": "yksityinen",
                                                "name": "Adolf Fredrik Böckerman"
                                            },
                                            "begin_day": 8,
                                            "begin_month": 12,
                                            "begin_year": 1862,
                                            "end_day": 19,
                                            "end_month": 3,
                                            "end_year": 1893,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 379,
                                            "owner": {
                                                "id": 244,
                                                "type": "yksityinen",
                                                "name": "Erik Johan Willstedt"
                                            },
                                            "begin_day": 20,
                                            "begin_month": 3,
                                            "begin_year": 1893,
                                            "end_day": 12,
                                            "end_month": 4,
                                            "end_year": 1896,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 380,
                                            "owner": {
                                                "id": 557,
                                                "type": "osakeyhtiö",
                                                "name": "Palovakuutus oy. Pohjola"
                                            },
                                            "begin_day": 22,
                                            "begin_month": 6,
                                            "begin_year": 1896,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1898,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1899,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/619-475/?format=api",
                                "id": "619-475",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/475/?format=api",
                                    "id": 475,
                                    "neighborhood": "Kaartinkaupunki",
                                    "addresses": [
                                        {
                                            "id": 300,
                                            "location": {
                                                "coordinates": [
                                                    24.9462886,
                                                    60.1667745
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Korkeavuorenkatu 47",
                                            "street_name_sv": "Högbergsgatan 47",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 746,
                                            "location": {
                                                "coordinates": [
                                                    24.9462886,
                                                    60.1667745
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Eteläesplanadi 18",
                                            "street_name_sv": "Södra esplanaden 18",
                                            "zip_code": "00130",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1928,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": null,
                                    "architect": null,
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Aina Tavaststjernas småbarsskola 1889-1894, Suomen liikemiesten kauppaopisto 1900-1907",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 475,
                                            "owner": {
                                                "id": 273,
                                                "type": "yksityinen",
                                                "name": "Frans Oscar Liewendal"
                                            },
                                            "begin_day": 27,
                                            "begin_month": 10,
                                            "begin_year": 1851,
                                            "end_day": 18,
                                            "end_month": 12,
                                            "end_year": 1898,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 476,
                                            "owner": {
                                                "id": 558,
                                                "type": "yksityinen",
                                                "name": "Gust. Rud. Liewendal & Edv. Jul. Liewendal"
                                            },
                                            "begin_day": 27,
                                            "begin_month": 2,
                                            "begin_year": 1899,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1928,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": [
                                        {
                                            "id": 38,
                                            "url": "https://hkm.finna.fi/Cover/Show?id=hkm.HKMS000005%3A000000a3&w=1200&h=1200",
                                            "is_front": true
                                        }
                                    ]
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1900,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1907,
                                "ownership": false,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/619-619/?format=api",
                                "id": "619-619",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/619/?format=api",
                                    "id": 619,
                                    "neighborhood": "Kluuvi",
                                    "addresses": [
                                        {
                                            "id": 729,
                                            "location": {
                                                "coordinates": [
                                                    24.9483175,
                                                    60.1708681
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Fabianinkatu 26",
                                            "street_name_sv": "Fabiansgatan 26",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1907,
                                    "architect": "K. S. Kallio",
                                    "architect_firm": "von Essen, Kallio ja Ikäläinen",
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Suomen liikemiesten kauppaopisto 1907-1927, 1950-",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 583,
                                            "owner": {
                                                "id": 3,
                                                "type": "valtio",
                                                "name": "Suomen valtio"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1948,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 584,
                                            "owner": {
                                                "id": 554,
                                                "type": "osakeyhtiö",
                                                "name": "Suomen liikemiesten kauppaopiston osakeyhtiö"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1906,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1927,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 585,
                                            "owner": {
                                                "id": 555,
                                                "type": "osakeyhtiö",
                                                "name": "Korkeamman kauppaopetuksen kannatusosakeyhtiö"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1927,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1948,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1907,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1927,
                                "ownership": true,
                                "reference": null
                            },
                            {
                                "url": "https://api.hel.fi/kore/v1/school_building/619-620/?format=api",
                                "id": "619-620",
                                "building": {
                                    "url": "https://api.hel.fi/kore/v1/building/620/?format=api",
                                    "id": 620,
                                    "neighborhood": "Kluuvi",
                                    "addresses": [
                                        {
                                            "id": 730,
                                            "location": {
                                                "coordinates": [
                                                    24.9483175,
                                                    60.1708681
                                                ],
                                                "type": "Point"
                                            },
                                            "street_name_fi": "Vuorikatu 5",
                                            "street_name_sv": "Berggatan 5",
                                            "zip_code": "00100",
                                            "municipality_fi": "Helsinki",
                                            "municipality_sv": "Helsingfors",
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1820,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "comment": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "construction_year": 1927,
                                    "architect": "Väinö Vähäkallio",
                                    "architect_firm": null,
                                    "property_number": null,
                                    "sliced": false,
                                    "comment": "Suomen liikemiesten kauppaopisto 1927-1950",
                                    "reference": null,
                                    "approx": false,
                                    "owners": [
                                        {
                                            "id": 586,
                                            "owner": {
                                                "id": 3,
                                                "type": "valtio",
                                                "name": "Suomen valtio"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1948,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": null,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 587,
                                            "owner": {
                                                "id": 555,
                                                "type": "osakeyhtiö",
                                                "name": "Korkeamman kauppaopetuksen kannatusosakeyhtiö"
                                            },
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1906,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1948,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ],
                                    "photos": []
                                },
                                "photos": [],
                                "approx_begin": false,
                                "approx_end": false,
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1927,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1950,
                                "ownership": true,
                                "reference": null
                            }
                        ],
                        "owners": [
                            {
                                "id": 649,
                                "owner": {
                                    "id": 554,
                                    "type": "osakeyhtiö",
                                    "name": "Suomen liikemiesten kauppaopiston osakeyhtiö"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1898,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1927,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 650,
                                "owner": {
                                    "id": 555,
                                    "type": "osakeyhtiö",
                                    "name": "Korkeamman kauppaopetuksen kannatusosakeyhtiö"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1927,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1949,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            },
                            {
                                "id": 651,
                                "owner": {
                                    "id": 556,
                                    "type": "säätiö",
                                    "name": "Suomen liikemiesten kauppaopiston säätiö"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1949,
                                "end_day": null,
                                "end_month": null,
                                "end_year": null,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false
                            }
                        ],
                        "founders": [
                            {
                                "id": 512,
                                "founder": {
                                    "id": 554,
                                    "type": "osakeyhtiö",
                                    "name": "Suomen liikemiesten kauppaopiston osakeyhtiö"
                                },
                                "reference": null
                            }
                        ],
                        "principals": [
                            {
                                "id": 1798,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1412/?format=api",
                                    "id": 1412,
                                    "surname": "Brofeldt",
                                    "first_name": "Kaarlo"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1898,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1899,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 619
                            },
                            {
                                "id": 1799,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1413/?format=api",
                                    "id": 1413,
                                    "surname": "Järvinen",
                                    "first_name": "Kyösti"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1898,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1919,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 619
                            },
                            {
                                "id": 1800,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1414/?format=api",
                                    "id": 1414,
                                    "surname": "Bonsdorff",
                                    "first_name": "Wäinö"
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1919,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1921,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 619
                            },
                            {
                                "id": 1801,
                                "principal": {
                                    "url": "https://api.hel.fi/kore/v1/principal/1415/?format=api",
                                    "id": 1415,
                                    "surname": "Kaitila",
                                    "first_name": "I. V."
                                },
                                "begin_day": null,
                                "begin_month": null,
                                "begin_year": 1921,
                                "end_day": null,
                                "end_month": null,
                                "end_year": 1922,
                                "reference": null,
                                "approx_begin": false,
                                "approx_end": false,
                                "school": 619
                            }
                        ],
                        "special_features": null,
                        "wartime_school": false,
                        "nicknames": null,
                        "checked": false,
                        "archives": [
                            {
                                "url": null,
                                "data_type": {
                                    "id": 1,
                                    "name": "arkistoaineisto"
                                },
                                "location": "Koulu",
                                "begin_year": 1898,
                                "end_year": null,
                                "arkiston_nimi": "tark",
                                "school": 619,
                                "name": 1175
                            }
                        ],
                        "lifecycle_event": [
                            {
                                "description": "koulun perustaminen",
                                "day": null,
                                "month": null,
                                "year": 1889,
                                "decisionmaker": null,
                                "additional_info": null
                            }
                        ],
                        "continuum_active": [
                            {
                                "active_school": "https://api.hel.fi/kore/v1/school/619/?format=api",
                                "description": "separates from",
                                "target_school": {
                                    "url": "https://api.hel.fi/kore/v1/school/708/?format=api",
                                    "id": 708,
                                    "names": [
                                        {
                                            "id": 1138,
                                            "official_name": "Helsingin liiketalouden ammattikorkeakoulu",
                                            "other_names": [
                                                {
                                                    "value": "HELIA",
                                                    "type": "lyhenne"
                                                }
                                            ],
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1992,
                                            "end_day": 1,
                                            "end_month": 1,
                                            "end_year": 2007,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ]
                                },
                                "day": null,
                                "month": null,
                                "year": 1992,
                                "reference": null
                            }
                        ],
                        "continuum_target": [
                            {
                                "active_school": {
                                    "url": "https://api.hel.fi/kore/v1/school/706/?format=api",
                                    "id": 706,
                                    "names": [
                                        {
                                            "id": 1136,
                                            "official_name": "ATK-instituutti",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1970,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1999,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ]
                                },
                                "description": "joins",
                                "target_school": "https://api.hel.fi/kore/v1/school/619/?format=api",
                                "day": null,
                                "month": null,
                                "year": 1999,
                                "reference": null
                            },
                            {
                                "active_school": {
                                    "url": "https://api.hel.fi/kore/v1/school/637/?format=api",
                                    "id": 637,
                                    "names": [
                                        {
                                            "id": 993,
                                            "official_name": "Suomen Liikemies-Yhdistyksen Kauppa-apulais iltakurssit",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1902,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1915,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 994,
                                            "official_name": "Suomen Liikemies-Yhdistyksen Liikeapulais-iltakurssit",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1915,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1943,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 995,
                                            "official_name": "Suomen Liikemiesyhdistyksen Liikeapulaiskoulu",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1943,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1966,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 996,
                                            "official_name": "Suomen Liikemiesyhdistyksen Kauppaoppilaitos",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1967,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1967,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        },
                                        {
                                            "id": 997,
                                            "official_name": "Suomen Liikemiesyhdistyksen Eiran kauppaoppilaitos",
                                            "other_names": null,
                                            "begin_day": null,
                                            "begin_month": null,
                                            "begin_year": 1967,
                                            "end_day": null,
                                            "end_month": null,
                                            "end_year": 1978,
                                            "reference": null,
                                            "approx_begin": false,
                                            "approx_end": false
                                        }
                                    ]
                                },
                                "description": "joins",
                                "target_school": "https://api.hel.fi/kore/v1/school/619/?format=api",
                                "day": null,
                                "month": null,
                                "year": 1978,
                                "reference": null
                            }
                        ]
                    },
                    "begin_day": null,
                    "begin_month": null,
                    "begin_year": 1898,
                    "end_day": null,
                    "end_month": null,
                    "end_year": 1899,
                    "reference": null,
                    "approx_begin": false,
                    "approx_end": false,
                    "principal": 1412
                }
            ]
        }
    ]
}