Did {Eva_Braun} {sibling} {Gretl Braun} and {Ilse Braun} ?
Were Greti and Ilse Braun siblings of Eva Braun?
Were Eva Braun's siblings Gretl and Ilse Braun?
ASK WHERE { resource:Eva_Braun property:sibling resource:Ilse_Braun . resource:Eva_Braun property:sibling resource:Gretl_Braun }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q76433> . ?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/Q1165052>. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q76433> . ?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/Q6001165>. } 
ASK WHERE { wd:Q76433 wdt:P3373 wd:Q1165052 . wd:Q76433 wdt:P3373 wd:Q6001165 }