Conversation so far:
Did Jane Goodall come to Africa?
Jane Goodall had always been passionate about animals and Africa, which brought her to the farm of a friend in the Kenya highlands in 1957.
Who did Jane Goodall meet in Africa?
Jane Goodall met Louis Leakey in Africa.
Did Jane Goodall visit other places in Africa apart from Kenya?
Louis Leakey sent Jane Goodall to Olduvai Gorge in Tanganyika, now known as Tanzania.
Who did Jane Goodall meet in Tanzania?
Roots & Shoots began in 1991 when a group of 16 local teenagers met with Jane Goodall on her back porch in Dar es Salaam, Tanzania.

Question: When did she leave africa?
Self-contained rewrite: When did Jane Goodall leave Africa?