https://w3id.org/framester/conceptnet5/cla/la.retentio.n <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/hold> <https://w3id.org/framester/conceptnet5/data/en/withhold> <https://w3id.org/framester/conceptnet5/data/en/retain> <https://w3id.org/framester/conceptnet5/data/en/preservation> <https://w3id.org/framester/conceptnet5/data/en/maintenance> <https://w3id.org/framester/conceptnet5/data/en/keep_back> risorse dalla linked data cloud