Assertion: trapezoid's face | /r/HasAspect | two secondary faces
Facets:
value: by a small semicircular obtuse crest
type: CAUSE
Source sentences:
text: The internal face is divided into two secondary faces by a small semicircular obtuse crest; the facet that is higher is flat and articulates with the lunate; the facet that is lower, much excavated, corresponds to the external part of the head of the large bone.