Premise: Beyond the Valley of the Dolls is a 1970 American satirical musical melodrama film starring Dolly Read, Cynthia Myers, Marcia McBroom, Phyllis Davis, John LaZar, Michael Blodgett and David Gurian. The film was directed by Russ Meyer and co-written by Meyer and Roger Ebert.
Hypothesis: Roger Ebert was not considered a co-writer for this film.