Assertion: neck's vertebra | /r/HasProperty | atlas
Facets:
Source sentences:
text: For example, at the atlantoaxial joint, the first cervical (C1) vertebra (atlas) rotates around the dens, the upward projection from the second cervical (C2) vertebra (axis).
text: The head rests on the top part of the vertebral column, with the skull joining at C1 (the first cervical vertebra known as the atlas).