https://w3id.org/framester/wn/wn30/instances/word-step-down <https://w3id.org/framester/wn/wn30/schema/Collocation> <https://w3id.org/framester/wn/wn30/schema/lexicalForm> step-down rdf:type <https://w3id.org/framester/wn/wn30/schema/Collocation> risorse dalla linked data cloud