Did {Wyatt_Earp} {sibling} {Virgil Earp} and {James Earp} ?
Was Wyatt, Virgil and James all brothers?
Are {Wyatt_Earp} {sibling}  {Virgil Earp} and {James Earp} ?
ASK WHERE { resource:Wyatt_Earp property:sibling resource:Virgil_Earp . resource:Wyatt_Earp property:sibling resource:James_Earp }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q44616> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3373> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q931824>. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q44616> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3373> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q3806537>. } 
ASK WHERE { wd:Q44616 wdt:P3373 wd:Q931824 . wd:Q44616 wdt:P3373 wd:Q3806537 }