How many movies were directed by the graduate of Burbank High School ?
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/education> <http://dbpedia.org/resource/Burbank_High_School_(Burbank,_California)> . ?uri <http://dbpedia.org/property/director> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Film>}
Burbank_High_School_(Burbank,_California)