Did {Treaty_of_Versailles} {signatory} {Italy} and {British Empire} ?
Were Britain and Italy both signatories to the Treaty of Versailles?
Were Italy and Britain signatories to the Treaty of Versailles?
ASK WHERE { resource:Treaty_of_Versailles property:signatory resource:British_Empire . resource:Treaty_of_Versailles property:signatory resource:Italy }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q8736> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1891> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q38>. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q8736> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1891> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q8680>. } 
ASK WHERE { wd:Q8736 wdt:P1891 wd:Q38 . wd:Q8736 wdt:P1891 wd:Q8680 }