Assertion: ischium's spine | /r/HasProperty | a protrusionof the ischium
Facets:
Source sentences:
text: Its rear (dorsal) border forms the greater and lesser sciatic notches, which are ridges separated by the spine (a protrusion) of the ischium.
text: Its rear (dorsal) border forms the greater and lesser sciatic notches, which are ridges separated by the spine (a protrusion) of the ischium.