https://w3id.org/framester/conceptnet5/data/en/hypocycloid <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/astroid> <https://w3id.org/framester/conceptnet5/data/en/cycloid> <https://w3id.org/framester/conceptnet5/data/en/spirograph> <https://w3id.org/framester/conceptnet5/data/en/roulette> <https://w3id.org/framester/conceptnet5/data/en/epicycloid> risorse dalla linked data cloud