What is the {foundation} for {operator} of {Wikipedia}
What foundation is operated by Wikipedia?
Wikipedia is the operator of what foundation?
SELECT DISTINCT ?f WHERE { resource:Wikipedia property:operator ?f . ?f rdf:type ontology:foundation }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q52> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P137> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q157031> } 
 select distinct ?obj where { wd:Q52 wdt:P137 ?obj . ?obj wdt:P31 wd:Q157031 } 
Wikimedia Foundation