Assertion: spondylolisthesis | /r/AtLocation | people
Facets:
value: over age
type: OTHER
value: usually
type: TEMPORAL
Source sentences:
text: In adults, spondylolisthesis usually occurs in people over age 40 as the result of age-related degeneration in the spine’s joints and discs, such as osteoarthritis of the spine or degenerative disc disease.