What is the casting of the movie directed by Justin Zackham ?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/director> <http://dbpedia.org/resource/Justin_Zackham> . ?x <http://dbpedia.org/property/starring> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Film>}
Justin_Zackham