https://w3id.org/framester/conceptnet5/data/en/pigsty <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/pig.n> <https://w3id.org/framester/conceptnet5/schema/Synonym> <https://w3id.org/framester/conceptnet5/data/en/pigpen> risorse dalla linked data cloud