Assertion: trapezoid's surface | /r/HasProperty | the base of the pyramid
Facets:
Source sentences:
text: The lateral surface, the base of the pyramid, is marked by a flat, quadrilateral facet, for articulation with the lunate.
text: The lateral surface, the base of the pyramid, is marked by a flat, quadrilateral facet, for articulation with the lunate.
text: The lateral surface, the base of the pyramid, is marked by a flat, quadrilateral facet, for articulation with the lunate.