Assertion: spondylolisthesis's vertebra | /r/AtLocation | risk
Facets:
value: for spondylolisthesis
type: PURPOSE
value: always
type: DEGREE
Source sentences:
text: A spondylolysis can be a precursor to spondylolisthesis, but spondylolisthesis can occur independently but bear in mind that a vertebra with spondylolysis is always at risk for spondylolisthesis.