Assertion: spondylolisthesis's vertebra | /r/HasSubevent | spondylolisthesis
Facets:
Source sentences:
text: A vertebra with stress fractures on both sides is more likely to slip out of alignment, leading to spondylolisthesis.
text: Spondylolysis is a defect or fracture of one or both wing-shaped parts of a vertebra, which can lead to spondylolisthesis.