Assertion: sciatic nerve | /r/HasProperty | formed in pelvi
Facets:
value: from nerve roots
type: LOCATION
Source sentences:
text: The sciatic nerve is formed in the pelvis from nerve roots that begin in the lower back vertebrae (lumbar 4 [L4], lumbar 5 [L5]) and sacrum (sacral 1[S1], sacral 2 [S2], sacral 3 [S3]).