query-412abac35d30d5f736620b00871b6eb8

rq turtle/ttl

Collectors linked to RKDartists them. (P127)owned by for an overview of (human) owners by number of paintings Wikidata:WikiProject sum of all paintings/OwnersSee To find the art collectors, include a statement for occupation = art collector:

Use at

https://query.wikidata.org/sparql

PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
SELECT (COUNT(DISTINCT ?item) AS ?count) WHERE {
  ?item wdt:P31 wd:Q5;
    wdt:P106 wd:Q10732476;
    wdt:P650 ?rkd.
  }

Query found at

https://www.wikidata.org/wiki/Wikidata:WikiProject_RKD

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v3("?count") v1("?item"):::projected v2("?rkd") c4(["wd:Q10732476"]):::iri c2(["wd:Q5"]):::iri v1 --"wdt:P31"--> c2 v1 --"wdt:P106"--> c4 v1 --"wdt:P650"--> v2 bind1[/"count(?item)"/] v1 --o bind1 bind1 --as--o v3