Assertion: chimpanzee's group | /r/HasProperty | goodall
Facets:
Source sentences:
text: There is a period of adolescent infertility in female chimpanzees that usually coincides with permanent emigration from their natal groups (Goodall 1986; Nishida et al. 2003).
text: The complete transition between groups may take up to two years, though, and is characterized by vacillating between their natal group and new community (Goodall 1986; Hasegawa 1989; Pusey 1990).