Count the number of movies whose distributor is RKO Pictures and director of photography is Gregg Toland?
SELECT DISTINCT COUNT(?uri) WHERE {?uri <http://dbpedia.org/property/distributor> <http://dbpedia.org/resource/RKO_Pictures> . ?uri <http://dbpedia.org/ontology/cinematography> <http://dbpedia.org/resource/Gregg_Toland> }
RKO_Pictures Gregg_Toland