Conversation so far:
When did Raven-Symoné begin on the Cosby show?
age of three, she was considered too young for the role, but Cosby liked her so much that he found a role for her on his show, The Cosby Show.
What role did she play?
his step-granddaughter Olivia.

Question: When did she leave the show?
Self-contained rewrite: When did Raven-Symoné leave the Cosby show?