Question: What is the product of the BBC Multimedia and is the theme of Visions, the convention?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/BBC_Multimedia> <http://dbpedia.org/ontology/product> ?uri. <http://dbpedia.org/resource/Visions_(convention)> <http://dbpedia.org/property/genre> ?uri}