https://w3id.org/framester/conceptnet5/data/en/hark_back <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/hark.v> <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/halcyon_day> risorse dalla linked data cloud