Give me a list of all the buildings which are located in districts governed by John Tory.
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/leaderName> <http://dbpedia.org/resource/John_Tory> . ?uri <http://dbpedia.org/ontology/location> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Building>}
John_Tory