Assertion: acetabulum | /r/CapableOf | form the socket
Facets:
Source sentences:
text: The head of the femur (thighbone) forms the ball, and the acetabulum forms the socket.
text: It forms a socket which contains the ball-shaped head of the thigh bone, or femur, allowing it to rotate quite freely.
text: The acetabulum, which is formed by the large pelvic bone, forms the “socket.