What is the {school} for {item operated} of {DC-3}
Which is the school that works the DC-3?
Which is the school that operates the DC-3?
SELECT DISTINCT ?m WHERE { ?m property:item_operated resource:DC-3 . ?m rdf:type ontology:school }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P121> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q190211> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q3914> } 
 select distinct ?sbj where { ?sbj wdt:P121 wd:Q190211 . ?sbj wdt:P31 wd:Q3914 } 
National Test Pilot School