Assertion: sacrum's ligament | /r/CapableOf | attach to the si joint
Facets:
value: in the front
type: LOCATION
value: in back
type: LOCATION
value: on the ilial or sacral surfaces
type: LOCATION
Source sentences:
text: Muscles and ligaments surround and attach to the SI joint in the front and back, primarily on the ilial or sacral surfaces.