https://w3id.org/framester/conceptnet5/data/en/rdml <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/rear_admiral_low_half> <https://w3id.org/framester/conceptnet5/data/en/radm> risorse dalla linked data cloud