In which region is the rival school of Somerset, Massachusetts located?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/rival> <http://dbpedia.org/resource/Somerset,_Massachusetts> . ?x <http://dbpedia.org/ontology/region> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/School>}
Somerset,_Massachusetts