Did {William_the_Conqueror} {owner of} {Tower of London} and {Windsor} ?
Was it William the Conqueror who built the Tower of London and Windsor Castle?
Did William the Conqueror build the Tower of London and Windsor Castle?
ASK WHERE { resource:William_the_Conqueror property:owner_of resource:Windsor . resource:William_the_Conqueror property:owner_of resource:Tower_of_London }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q37594> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1830> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q62378>. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q37594> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1830> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q464955>. } 
ASK WHERE { wd:Q37594 wdt:P1830 wd:Q62378 . wd:Q37594 wdt:P1830 wd:Q464955 }