<prompt> Qedela umusho olandelayo: UManfred Walter ungumuntu owayengumshayeli wezikebhe waseSwitzerland owaqhudelana ngawo-1970. Wathola indondo yesiliva emncintiswaneni weqembu le-C-2 eMqhudelwaneni  <response>: Ngo-1977 ICF Canoe Slalom World Championships eSpittal. 