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