For Those Who Think Young is a 1964 beach party film shot in Techniscope, directed by Leslie H. Martinson and featuring James Darren, Pamela Tiffin, Paul Lynde, Tina Louise, Bob Denver, Nancy Sinatra, Robert Middleton, Ellen Burstyn (billed as Ellen McRae), Claudia Martin and Woody Woodbury.
Woody Woodbury and Bob Denver have been in more than one movie together.
Woody Woodbury and Bob Denver were in "For Those Who Think Young", so they were in at least one movie together. They may or or may not have been in other movies together. I think the AI is confused because there isn't enough context for it to fully understand.