Assertion: baboon's skin | /r/CapableOf | become swollen
Facets:
Source sentences:
text: Males have a single, hard pad of naked grey skin that extends across both buttocks, but the female buttock-pads are pink, and at the onset of the menstrual cycle the skin becomes bright and swollen.
text: While in heat, the bare skin on her bottom becomes pink and swollen, and she may mate with several males.