Question: Who is the compiler of British Gazette whose prime minister is also Peter Thorneycroft ?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/British_Gazette> <http://dbpedia.org/property/editor> ?uri. <http://dbpedia.org/resource/Peter_Thorneycroft> <http://dbpedia.org/property/primeminister> ?uri}