Assertion: octahedron's vertex | /r/CapableOf | form cube
Facets:
Source sentences:
text: Vertex coordinates: The orange vertices lie at (±1, ±1, ±1) and form a cube (dotted lines).
text: The rhombic dodecahedron has 8 vertices in the middle that form a cube, (ABCD-EFGH), and the other 6 on the outside which form an octahedron (N-ILJK-M).