 Complete the following phrase:  Tomáš Křivánek born January 10, 1966 is a Czechoslovak-Czech sprint canoeist who competed from the late 1980s to the late 1990s. He won five medals at the ICF Canoe Sprint World Championships with a gold C-4 200 m: 1998, a silver C-4 200 m: 1995 and three bronzes C-4 200 m: 1994, 1997; C-4 500 m: 