Which football teams are in a city where Oakland Athletics were the tenants?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/tenant> <http://dbpedia.org/resource/Oakland_Athletics> . ?uri <http://dbpedia.org/ontology/locationCity> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/AmericanFootballTeam>}
Oakland_Athletics