Assertion: female chimpanzee | /r/HasProperty | ready to breed
Facets:
value: at the age of 10
type: TEMPORAL
Source sentences:
text: Male chimpanzees are capable of reproducing when they are 16 years old whereas females reach estrus (the swelling of the ano-genital region that signifies that the female chimpanzee is ready to breed) at the age of 10.