Did {Frank_Zappa} {child} {Moon Zappa} and {Ahmet Zappa} ?
Are Moon and Ahmet Zappa both Frank Zappa's kids?
Is Frank Zappa the father of both Moon and Ahmet Zappa?
ASK WHERE { resource:Frank_Zappa property:child resource:Moon_Zappa . resource:Frank_Zappa property:child resource:Ahmet_Zappa }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q127330> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P40> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q291024>. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q127330> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P40> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q401963>. } 
ASK WHERE { wd:Q127330 wdt:P40 wd:Q291024 . wd:Q127330 wdt:P40 wd:Q401963 }