What is the location of the pope whose major shrine is St. Peter's Basilica ?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/majorShrine> <http://dbpedia.org/resource/St._Peter's_Basilica> . ?x <http://dbpedia.org/property/birthPlace> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Pope>}
St._Peter's_Basilica