How many more teams have rented the stadium used by Raptors 905?
SELECT DISTINCT COUNT(?uri) WHERE { <http://dbpedia.org/resource/Raptors_905> <http://dbpedia.org/property/arena> ?x . ?x <http://dbpedia.org/ontology/tenant> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Stadium>}
Raptors_905