Did {Lucille_Ball} {child} {Desi Arnaz, Jr.}?
Is it true that Lucille Ball is a child of Desi Arnaz, Jr.?
Is Lucille Ball a child of Desi Arnaz, Jr.?
ASK WHERE { resource:Lucille_Ball property:child resource:Desi_Arnaz,_Jr. }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q209662> . ?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/Q324882>. } 
ASK WHERE { wd:Q209662 wdt:P40 wd:Q324882 }