https://w3id.org/framester/conceptnet5/data/en/magnetism <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/magnet.n> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/magnetic_phenomenon_and_their_science> <https://w3id.org/framester/conceptnet5/data/en/physical_phenomenon> risorse dalla linked data cloud