Did {Mary_I_of_England} {sibling} {Edward VI of England}?
Is it true that Mary I of England is a sibling of Edward VI of England
Is Mary I of England a sibling of Edward VI of England?
ASK WHERE { resource:Mary_I_of_England property:sibling resource:Edward_VI_of_England }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q82674> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3373> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q83229>. } 
ASK WHERE { wd:Q82674 wdt:P3373 wd:Q83229 }