https://w3id.org/framester/conceptnet5/data/en/copper_sulfate <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/copper.n> <https://w3id.org/framester/conceptnet5/data/en/sulfate.n> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/crystal> <https://w3id.org/framester/conceptnet5/data/en/inorganic_compound> <https://w3id.org/framester/conceptnet5/data/en/strong_electrolyte> <https://w3id.org/framester/conceptnet5/data/en/ionic_compound> <https://w3id.org/framester/conceptnet5/data/en/toxic_substance> risorse dalla linked data cloud