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Wiki information Koryakin:
Vitaly Koryakin is a male freestyle wrestler from Tajikistan. He participated in Men's freestyle 60 kg at 2008 Summer Olympics. He was eliminated in 1/8 final by Kenichi Yumoto from Japan.
Sergey Koryashkin is a Soviet fencer. He won a silver medal in the team sabre event at the 1988 Summer Olympics.