Question: Which magazine's editor's official residence is Playboy Mansion?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/residence> <http://dbpedia.org/resource/Playboy_Mansion> . ?uri <http://dbpedia.org/property/editor> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Magazine>}