Assertion: coccyx's surface | /r/CapableOf | articulate with the ilia of the os coxae
Facets:
value: at the sacroiliac joints
type: LOCATION
Source sentences:
text: Auricular surfaces (facies auricularis) are ear-shaped surfaces on the lateral sides of the bone that articulate with the ilia of the os coxae at the sacroiliac joints.