Conversation so far:
What was Foster's first role?
Foster's career began with an appearance as the Coppertone girl.
What year was she the Coppertone Girl?
in a television advertisement in 1965.
What was her next appearance after that?
a minor appearance in the sitcom Mayberry R.F.D..

Question: What year was her appearance on Mayberry?
Self-contained rewrite: What year was Jodie Foster's appearance on Mayberry?