https://w3id.org/framester/conceptnet5/data/en/book_store <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/store> <https://w3id.org/framester/conceptnet5/schema/Synonym> <https://w3id.org/framester/conceptnet5/data/en/bookshop> risorse dalla linked data cloud