https://w3id.org/framester/wn/wn30/instances/word-safety_valve <https://w3id.org/framester/wn/wn30/schema/Word> <https://w3id.org/framester/wn/wn30/schema/lexicalForm> safety valve rdf:type <https://w3id.org/framester/wn/wn30/schema/Word> risorse dalla linked data cloud