https://w3id.org/framester/conceptnet5/data/en/surreptitious.a <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/hide> <https://w3id.org/framester/conceptnet5/data/en/covert> <https://w3id.org/framester/conceptnet5/data/en/furtive> <https://w3id.org/framester/conceptnet5/data/en/stealth> risorse dalla linked data cloud