Question: what kind of games can I find for PC 9800?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/computingPlatform> <http://dbpedia.org/resource/PC-9800_Series> . ?x <http://dbpedia.org/property/genre> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/VideoGame>}