How many bands collaborated with artists who signed up with EMI?
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/recordLabel> <http://dbpedia.org/resource/EMI> . ?x <http://dbpedia.org/ontology/associatedMusicalArtist> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Band>}
EMI