Assertion: spondylolisthesis's vertebra | /r/CapableOf | fall off supporting bone
Facets:
value: below it
type: LOCATION
value: completely
type: DEGREE
Source sentences:
text: For example, Grade 1 indicates slippage of less than 25 percent, while Grade 5 represents 100 percent slippage—where the top vertebra completely falls off the supporting bone below it.
text: There are varying grades of severity (from 1 to 5) with spondylolisthesis; grade 1 is the least severe, with less than 25 percent slippage, while grade 5 indicates the top vertebrae has fallen completely off the supporting bone below it (otherwise known as 100 percent slippage).