https://w3id.org/framester/conceptnet5/data/en/metalliferous.a <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/metal> <https://w3id.org/framester/conceptnet5/data/en/metallic> <https://w3id.org/framester/conceptnet5/data/en/ore> <https://w3id.org/framester/conceptnet5/data/en/element> risorse dalla linked data cloud