<prompt> Nyora kupfuurira kweiyi ndima - Jiří Krejza aimbova muCzechoslovak-akaberekerwa muSwitzerland slalom canoeist uyo akakwikwidza kubva kutanga kwema1970 kusvika kutanga kwema1980. Akakunda menduru ina paICF Canoe Slalom World Championships negoridhe C-2: 1973 yeCzechoslovakia, sirivha mbiri C-2 timu: 1973 yeCzechoslovakia, 1977  <response>: nokuda kweSwitzerland uye bronze Mixed C-2: 1971 nokuda kweCzechoslovakia. 