Question: Who all are starring in the  movies where director of photography is John Derek ?
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 { ?x onto:cinematography <http://dbpedia.org/resource/John_Derek> . ?x prop:starring ?uri . ?x rdf:type onto:Film}