Question: What form of theater do Sean Pol McGreevy and Mack and Mabel have in common?
Sentence (from "Mack and Mabel"): In a series of flashbacks, Sennett relates the glory days of Keystone Studios from 1911, when he discovered Normand and cast her in dozens of his early "two-reelers", through his creation of Sennett's Bathing Beauties and the Keystone Cops to Mabel's death from tuberculosis in 1930.
Relevant evidence: No