Question: How many things are made by companies who produce mass media articles?
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:products <http://dbpedia.org/resource/Mass_media> . ?uri onto:manufacturer ?x . }