Question: What series is Mazes of Time from, and is produced by BBC multimedia?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/BBC_Multimedia> <http://dbpedia.org/ontology/product> ?uri. <http://dbpedia.org/resource/Doctor_Who:_The_Mazes_of_Time> <http://dbpedia.org/ontology/series> ?uri}