Question: Who was the friend the main rival of Johnny Torrio and Al Capone during the brutal Chicago bootlegging wars of the 1920s, also known as "The Schemer"?
Sentence (from "Dean O'Banion"): Charles Dean O'Banion (July 8, 1892 – November 10, 1924) was an American mobster who was the main rival of Johnny Torrio and Al Capone during the brutal Chicago bootlegging wars of the 1920s.
Relevant evidence: Yes