https://w3id.org/framester/conceptnet5/data/en/crystal_clear <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/clear.a> <https://w3id.org/framester/conceptnet5/schema/EtymologicallyDerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/clear> risorse dalla linked data cloud