What is the {video game developer} for {developer} of {Pong}
Which video game company developed Pong?
 select distinct ?obj where { wd:Q216293 wdt:P178 ?obj . ?obj wdt:P31 wd:Q210167 } 
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q216293> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P178> . ?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/Q210167> } 
Who is the president of Valencia?