What is the {enterprise} for {publisher} of {Space Invaders}
Which is the enterprise that was the publisher of Space Invaders?
 select distinct ?obj where { wd:Q220665 wdt:P123 ?obj . ?obj wdt:P31 wd:Q6881511 } 
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/P123> . ?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/Q6881511> } 
Give me the name of the Space Invaders publisher.