Question: The Cohen crime family, or the Siegel crime syndicate, was an Italian-American Mafia / Jewish Mafia crime family created by which New York Jewish American mobster, and was known as one of the most "infamous and feared gangsters of his day"?
Sentence (from "Cohen crime family"): Siegel ran Los Angeles and later Las Vegas' illegal gambling and prostitution rings with his lieutenants Mickey Cohen, David Berman, Harold "Hooky" Rothman, Moe Sedway and boss of the L.A. family Jack Dragna.
Relevant evidence: No