https://w3id.org/framester/conceptnet5/data/en/wrought_iron <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/wrought.a> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/iron.a.made_of_the_metal_iron> risorse dalla linked data cloud