 Complete the following phrase:  Martin Šimeček born July 29, 1967 in Příbram is a Czech retired competitive ice dancer. With partner Kateřina Mrázová, he is a multiple Czech national champion. They placed 10th at the 1992 Winter Olympics at which they competed for Czechoslovakia, 8th at the 1994 Winter Olympics, and 13th at the 1998 Winter Olympics. They retired from competitive skating following the 