Question: What great  boxer formerly known as Cassius Clay along with American former professional boxer and commentator trained at Gleason's Gym?
Sentence (from "Paulie Malignaggi"): Paul "Paulie" Malignaggi ( ; ; born November 23, 1980) is an American boxing commentator and analyst, and former professional boxer who competed from 2001 to 2017.
Relevant evidence: Yes