https://w3id.org/framester/conceptnet5/data/en/concavity <https://w3id.org/framester/conceptnet5/schema/Antonym> <https://w3id.org/framester/conceptnet5/data/en/convexity> <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/concave.a> risorse dalla linked data cloud