Assertion: vertebral column's vertebra | /r/HasAspect | four facet joints
Facets:
Source sentences:
text: Each vertebra has four facet joints, one pair that connects to the vertebra above (superior facets) and one pair that connects to the vertebra below (inferior facets) (Fig. 6).
text: Each vertebra has four facet joints, one pair that connects to the vertebra above and one below.