Question: Which  science fiction show has Steven Moffat as executive producer ?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/executiveProducer> <http://dbpedia.org/resource/Steven_Moffat> . ?uri <http://dbpedia.org/property/genre> <http://dbpedia.org/resource/Science_fiction>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/TelevisionShow>}