https://w3id.org/framester/conceptnet5/data/en/plane_curve <https://w3id.org/framester/conceptnet5/schema/AtLocation> <https://w3id.org/framester/conceptnet5/data/en/in_plane> <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/curve.n> risorse dalla linked data cloud