What is the {historic house museum} for {owned by} of {William IV of the United Kingdom}
Which historic house museum does William IV of the UK own?
 select distinct ?sbj where { ?sbj wdt:P127 wd:Q130822 . ?sbj wdt:P31 wd:Q2087181 } 
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P127> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q130822> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q2087181> } 
William IV of the UK is the owner of which historic house museum?