Question: List the producers who produced movies starring Michael Jackson.
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/starring> <http://dbpedia.org/resource/Michael_Jackson> . ?x <http://dbpedia.org/property/producer> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Film>}