What is <officeholder> of <Earl Warren> ?
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Which  is officeholder of Earl Warren ?
SELECT DISTINCT ?c WHERE { ?c property:officeholder resource:Earl_Warren }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject>  ?answer. ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1308> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q311197>. }
select distinct ?answer where { ?answer wdt:P1308 wd:Q311197}