Question: List the total number of executive producer of TV show which have one of the executiive producer as Steven Moffat ?
SPARQL query:
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT COUNT(?uri) WHERE { ?x onto:executiveProducer <http://dbpedia.org/resource/Steven_Moffat> . ?x prop:executiveProducer ?uri }