 Complete the following phrase:  Viacheslav Volodymyrovych Tkachenko , born in 1973 is a Ukrainian figure skating coach and former competitive pair skater. Competing with Svitlana Prystav for the Soviet Union, he became a three-time World Junior medalist in the early 1990s. Later in their career, the pair represented Ukraine. They appeared at three senior-level ISU Championships, placing 10th at the 1993 European Championships in Helsinki Finland, 13th at the 1993 World Championships in Prague Czech Republic, and 14th at the 