Did {Charlie_Chaplin} {languages spoken, written or signed} {German}?
Did Charlie Chaplin really know German?
Is it true that Charlie Chaplin knew German?
ASK WHERE { resource:Charlie_Chaplin property:languages_spoken,_written_or_signed resource:German }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q882> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1412> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q188>. } 
ASK WHERE { wd:Q882 wdt:P1412 wd:Q188 }