https://w3id.org/framester/conceptnet5/data/en/planetary_system <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/system> <https://w3id.org/framester/conceptnet5/data/en/astronomical_object> <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/constellation> <https://w3id.org/framester/conceptnet5/data/en/star_system> <https://w3id.org/framester/conceptnet5/data/en/exoplanet> <https://w3id.org/framester/conceptnet5/data/en/double_star> risorse dalla linked data cloud