Did {Harley_Quinn} {partner} {Hal Jordan}?
Was Hal Jordan partner of Harley Quinn?
It is true that Harley Quinn's partner was Hal Jordan?
ASK WHERE { resource:Harley_Quinn property:unmarried_partner resource:Hal_Jordan }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q849477> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P451> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q2345627>. } 
ASK WHERE { wd:Q849477 wdt:P451 wd:Q2345627 }