Question: What great  boxer formerly known as Cassius Clay along with American former professional boxer and commentator trained at Gleason's Gym?
Sentence (from "Gleason's Gym"): Fighters who trained at the gym include Jake LaMotta, Roberto Durán, Benny "Kid" Paret, Paulie Malignaggi, Gerry Cooney, and Mike Tyson.
Relevant evidence: No