Given the question: Generate a question that has the following answer: Crot for the following movie plot: Visiting the Russian Federation for a series of boxing matches, George "Iceman" Chambers is subsequently framed for possession of cocaine and sent to prison. There, he discovers a series of illegal full-contact Mixed Martial Arts matches dominated by inmate Yuri Boyka. The prison officials arrange these fights and place large side-bets to make a personal profit, often at the expense of the fighters.Once inside, the warden and legal adviser for Chambers state that if he fights Yuri in the ring, he will likely get an expedited appeal and early release. He initially refuses, but after spending time in demeaning physical labor in the prison's sewer system and experiencing firsthand the brutality of the guards, he reluctantly agrees. He is rescued from both forms of humiliation by a crippled inmate, Crot (Eli Danker). Both fighters train hard for the match, though Chambers still relies on his boxing background while Boyka prepares a series of deadly kicks, throws, and grappling combinations designed to humiliate his opponent in the ring. Prior to the fight however, Boyka's friends force George's cellmate, Steven, who is acting as his cornerman, to spike his water with a light sedative during the fight.During the fight, Chambers is somewhat taken by surprise at the flurry and variety of Boyka's attacks, but manages to hold his own through the first round by keeping his distance, staying calm, and dealing out painful punching combinations whenever possible. At the end of the first round, Steven slips the drugged water into Chambers' mouth and he takes a few sips. During the second round, he starts to lose his focus and begins taking more and more punishment until Boyka knocks him out with a devastating flying kick. Following the fight, Steven kills himself out of guilt.After the fight, Chambers (having learnt of the truth from Crot) confronts Boyka, believing that he was responsible for drugging him, and the warden, for going back on the deal. Boyka coldly tells him that he does not need drugs to win, and the warden...
The answer is:
Who trained Chambers?