Assertion: metacarpal's end | /r/CapableOf | combine with the lunate
Facets:
value: to form a deep concavity
type: PURPOSE
Source sentences:
text: The proximal end of the scaphoid combines with the lunate and triquetrum to form a deep concavity that articulates with the convexity of the combined capitate and hamate in a form of diarthrodial, almost condyloid joint.