Complex sentence: Parker starred in a number of theatrical productions, including the role of Margo Channing in the musical version of "All About Eve", "Applause" originally played in the musical by Lauren Bacall and in "All About Eve" by Bette Davis.
Split into simpler sentences: Parker starred in a number of theatrical productions, including the role of Margo Channing in the Broadway musical version of the film "All About Eve", "Applause". The role was originally played in the musical by Lauren Bacall and in "All About Eve" by Bette Davis.