https://w3id.org/framester/conceptnet5/cla/fro.merceant.n <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/vendor> <https://w3id.org/framester/conceptnet5/data/en/seller> <https://w3id.org/framester/conceptnet5/data/en/merchant> risorse dalla linked data cloud