What is the {human} for {stepparent} of {Barack Obama}
Who could be a stepparent of Barack Obama?
Who is a stepparent of Barack Obama?
SELECT DISTINCT ?x WHERE { resource:Barack_Obama property:stepparent ?x . ?x rdf:type ontology:human }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q76> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3448> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?obj where { wd:Q76 wdt:P3448 ?obj . ?obj wdt:P31 wd:Q5 } 
Lolo Soetoro