Complex sentence: In Chicago Black Hand extortion began around 1900 and had all but faded away by 1920, and the beginning of organized crime was started "the mafia" it was initially organized by Johnny Torrio, and somewhat organized by Al Capone.
Split into simpler sentences: In Chicago Black Hand extortion began around 1900 and had all but faded away by 1920, and the "Mafia" replaced it. The Faia was initially organized by Johnny Torrio, and somewhat organized by Al Capone.