Question: In the early 1900s Waukesha County, Wisconsin was a big resort area and vacation spot for people living in Chicago, among the people who visited Oconomowoc's for a little rest and relaxation were Chicago's most notorious gangsters, such as Adelard Cunin, better known as George 'Bugs' Moran, was a Chicago Prohibition-era gangster, and was incarcerated three times, before turning what age?
Sentence (from "Bugs Moran"): He was incarcerated three times before turning 21.
Relevant evidence: Yes