https://w3id.org/framester/conceptnet5/data/en/quaternion <https://w3id.org/framester/conceptnet5/schema/EtymologicallyDerivedFrom> <https://w3id.org/framester/conceptnet5/cla/enm.quaternioun> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/hypercomplex_number.n> risorse dalla linked data cloud