Question: How many companies have developed cross platformed software?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:operatingSystem <http://dbpedia.org/resource/Cross-platform> . ?x onto:developer ?uri . }