https://w3id.org/framester/conceptnet5/data/en/blue_vitriol <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/blue> <https://w3id.org/framester/conceptnet5/data/en/vitriol.n> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/copper_sulphate> <https://w3id.org/framester/conceptnet5/schema/Synonym> <https://w3id.org/framester/conceptnet5/data/en/copper_sulfate> risorse dalla linked data cloud