Question: Which executive producer of Into the Dalek also produced Wizards vs Aliens ?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT ?uri WHERE { res:Into_the_Dalek prop:executiveProducer ?uri. res:Wizards_vs_Aliens onto:producer ?uri}