Question: How many genres of games can I find on the commodore CDTV?
SPARQL query: SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/computingPlatform> <http://dbpedia.org/resource/Commodore_CDTV> . ?x <http://dbpedia.org/ontology/genre> ?uri  . }
Answer: There are [9] genres of games whose platform is Commodore CDTV.