Question: What came before  PlayStation 4 and uses PlayStation 3 system software as OS?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE {?uri onto:successor res:PlayStation_4 . ?uri prop:os res:PlayStation_3_system_software . }