Assertion: vertebral column's vertebra | /r/HasAspect | hole
Facets:
value: in the middle
type: LOCATION
value: in the center
type: LOCATION
Source sentences:
text: Each vertebra has a hole in the center, so when they stack on top of each other they form a hollow tube that holds and protects the entire spinal cord and its nerve roots.
text: Each vertebra has a hole in the middle through which the spinal cord runs.