https://w3id.org/framester/conceptnet5/data/en/niggard <https://w3id.org/framester/conceptnet5/schema/EtymologicallyDerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/ard> <https://w3id.org/framester/conceptnet5/data/en/nig> <https://w3id.org/framester/conceptnet5/cla/enm.nigard> risorse dalla linked data cloud