https://w3id.org/framester/conceptnet5/data/en/sedimentary <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/rock> <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/igneous> <https://w3id.org/framester/conceptnet5/data/en/metamorphic> risorse dalla linked data cloud