Name the river whose mouth place is Old Lyme, Connecticut?
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/mouthPlace> <http://dbpedia.org/resource/Old_Lyme,_Connecticut>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/River>}
Old_Lyme,_Connecticut