 Complete the following phrase:  Olga Pershankova ; born 18 January 1972 is a Russian retired ice dancer. Competing with Peter Tchernyshev for Russia, she won the silver medal at the 1992 Karl Schäfer Memorial Vienna Cup. The following season, she teamed up with Nikolai Morozov to compete for Azerbaijan. The two won the 1993 Golden Spin of Zagreb and competed at the 1994 