Assertion: fibula's head | /r/CapableOf | form the ball of the joint
Facets:
Source sentences:
text: The rounded head of the femur forms the ball of the joint.
text: The rounded head of the femur forms the ball of the joint.
text: The rounded head of the femur forms the ball of the joint.
text: The rounded head of the femur forms the ball of the joint.