Did {Dave_Grohl} {member of political party} {Democratic Party}?
Did Dave Grohl consider himself a member of the Democratic Party?
Was Dave Grohl part of the Democratic Party?
ASK WHERE { resource:Dave_Grohl property:member_of_political_party resource:Democratic_Party }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q12006> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P102> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q29552>. } 
ASK WHERE { wd:Q12006 wdt:P102 wd:Q29552 }