Question: Vitali Boot is a German amateur boxer best known to win the bronze medal at super heavyweight at the 2001 World Amateur Boxing Championships, there he beat Poland's Grzegorz Kielsa (20:14), but lost to which eventual winner, an Uzbek former professional boxer who competed from 1997 to 2016?
{'answer': 'Ruslan Chagaev', 'supporting_facts': [['Vitali Boot', 1], ['Ruslan Chagaev', 0]]}