https://w3id.org/framester/conceptnet5/data/en/sulfide.n <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/compound> <https://w3id.org/framester/conceptnet5/data/en/group> <https://w3id.org/framester/conceptnet5/data/en/sulfur> <https://w3id.org/framester/conceptnet5/data/en/metal> <https://w3id.org/framester/conceptnet5/data/en/element> <https://w3id.org/framester/conceptnet5/data/en/electropositive> risorse dalla linked data cloud