Assertion: sacrum | /r/UsedFor | refer to triangular bone
Facets:
value: in the lower back
type: LOCATION
Source sentences:
text: Sacrum refers to a triangular bone in the lower back formed from fused vertebrae and situated between the two hip bones of the pelvis while coccyx refers to a small triangular bone at the base of the spinal column in humans and some apes, formed of fused vestigial vertebrae.