https://w3id.org/framester/conceptnet5/data/en/pulsar.n <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/radio> <https://w3id.org/framester/conceptnet5/data/en/neutron_star> <https://w3id.org/framester/conceptnet5/data/en/magnetar> <https://w3id.org/framester/conceptnet5/data/en/rrat> <https://w3id.org/framester/conceptnet5/data/en/sgr> risorse dalla linked data cloud