Assertion: vertebral column's vertebra | /r/CapableOf | form the sacrum
Facets:
Source sentences:
text: Five vertebra are fused together to form the sacrum (part of the pelvis), and four small vertebra are fused together to form the coccyx (tailbone).
text: —seven cervical vertebrae, twelve thoracic vertebrae, five lumbar vertebrae, five fused sacral vertebrae forming the sacrum and three to five coccygeal vertebrae, forming the coccyx.