https://w3id.org/framester/conceptnet5/cla/la.concavus.a <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/hollow> <https://w3id.org/framester/conceptnet5/data/en/vault> <https://w3id.org/framester/conceptnet5/data/en/arch> <https://w3id.org/framester/conceptnet5/data/en/concave> risorse dalla linked data cloud