Question: Count the number of musical work which were sold by Sony Music?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:label <http://dbpedia.org/resource/Sony_Music_Entertainment> . ?uri prop:music ?x  . ?uri rdf:type onto:MusicalWork}