query: PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
  SELECT DISTINCT ?item ?itemLabel ?archieflocatie ?collectie ?instelling ?instellingLabel WHERE {
    SERVICE wikibase:label { bd:serviceParam wikibase:language "nl, en". }
  
    ?item wdt:P31 wd:Q5.
    ?item wdt:P570 ?death.
    {
     ?item wdt:P6379 ?collectie.
     BIND(?collectie AS ?instelling)
    }
    UNION
     {?item wdt:P485 ?archieflocatie.
     BIND(?archieflocatie AS ?instelling)
    }
    FILTER(?death > "1949-01-01T00:00:00Z"^^xsd:dateTime)
    FILTER(?death < "1950-01-01T00:00:00Z"^^xsd:dateTime)
  }