https://w3id.org/framester/conceptnet5/data/en/toxicity <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/toxi> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/tangible_physical_quantity> risorse dalla linked data cloud