Question: What Orson Welles directed movie has  photography director as Gregg Toland ?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/cinematography> <http://dbpedia.org/resource/Gregg_Toland> . ?uri <http://dbpedia.org/property/director> <http://dbpedia.org/resource/Orson_Welles>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Film>}