Question: Which documentary is the oldest, Buy Bye Beauty or Pumping Iron?
Sentence (from "Pumping Iron"): Directed by George Butler and Robert Fiore, it is inspired by a book of the same name by Butler and Charles Gaines, and nominally centers on the competition between Arnold Schwarzenegger and one of his primary competitors for the title of Mr. Olympia, Lou Ferrigno.
Relevant evidence: No