Did {Keira_Knightley} {given name} {Keira}?
Is Keira the given name of the actress Keira Knightley?
Is Keira Knightley's given name Keira?
ASK WHERE { resource:Keira_Knightley property:given_name resource:Keira }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q42581> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P735> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q6383805>. } 
ASK WHERE { wd:Q42581 wdt:P735 wd:Q6383805 }