Who owns a bridge in Boston?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/locatedInArea> <http://dbpedia.org/resource/Boston> . ?x <http://dbpedia.org/property/owner> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Bridge>}
Boston