https://w3id.org/framester/conceptnet5/data/en/nill.v <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/negate> <https://w3id.org/framester/conceptnet5/data/en/refuse> <https://w3id.org/framester/conceptnet5/data/en/reject> <https://w3id.org/framester/conceptnet5/data/en/unwilling> risorse dalla linked data cloud