What is the birth city of the Salford City F.C players?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/team> <http://dbpedia.org/resource/Salford_City_F.C.> . ?x <http://dbpedia.org/ontology/birthPlace> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/SoccerPlayer>}
Salford_City_F.C.