What is the {human} for {sibling} of {Richard III of England}
What is the name of the English sibling Richard III?
What is the name of Richard III of Englands' sibling
SELECT DISTINCT ?p WHERE { ?p property:sibling resource:Richard_III_of_England . ?p rdf:type ontology:human }
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/P3373> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q133028> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?sbj where { ?sbj wdt:P3373 wd:Q133028 . ?sbj wdt:P31 wd:Q5 } 
Edward IV of England Elizabeth of York, Duchess of Suffolk George Plantagenet, 1st Duke of Clarence Margaret of York Edmund, Earl of Rutland Anne of York, Duchess of Exeter