What is the {human} for {designed by} of {Space Invaders}
Space Invaders was designed by whom?
Who designed Space Invaders?
SELECT DISTINCT ?f WHERE { resource:Space_Invaders property:designed_by ?f . ?f 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/Q220665> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P287> . ?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:Q220665 wdt:P287 ?obj . ?obj wdt:P31 wd:Q5 } 
Tomohiro Nishikado