https://w3id.org/framester/conceptnet5/data/en/indubitable.a <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/true> <https://w3id.org/framester/conceptnet5/data/en/doubt> <https://w3id.org/framester/conceptnet5/schema/Synonym> <https://w3id.org/framester/conceptnet5/data/en/undoubtable> risorse dalla linked data cloud