https://w3id.org/framester/conceptnet5/data/en/ethyl.n <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/hydrogen> <https://w3id.org/framester/conceptnet5/data/en/hydrocarbon> <https://w3id.org/framester/conceptnet5/data/en/univalent> <https://w3id.org/framester/conceptnet5/data/en/ethane> risorse dalla linked data cloud