 Complete the following phrase:  Ko represented her nation at international competitions. She participated at Asian Speed Skating Championships, winning the silver medal in 1994 and 1995 in the 5000 metres event and finished in the 3000 metres 4th 1994 and 5th 1995 and in the 1500 metres 7th 1994. She also competed at other international competitions, including at ISU Speed Skating World Cups. She competed at the 