Completed the following sentence: Urmanov, who competed for the Soviet Union, won the silver medal at the 1990 World Junior Championships. a<unk>a<unk>a<unk>a<unk>a<unk>a<unk>a<unk>a<unk>a<unk>a<unk>a<unk>a<unk>a<unk>a<unk>a<unk> 1991<unk>, à l'âge de 17 ans, il a fait un saut quadruple au
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