https://w3id.org/framester/conceptnet5/data/en/obdurate <https://w3id.org/framester/conceptnet5/schema/EtymologicallyDerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/endure> <https://w3id.org/framester/conceptnet5/data/en/durable> risorse dalla linked data cloud