<prompt> Ngwala tšwetšopele ya serapa se - Sergey Nikolskiy ke moswari wa seketswana wa Soviet yo a bego a phenkgišana magareng ga bo-1970 le mafelelong a bo-1970. O thopile dimetale tše hlano ka ICF Canoe Sprint World Championships ka gauta tše nne K-1 4 x 500 m: 1973, K-4 10000 m: 1977, 1978  <response>: , 1979, le silifera K-4 1000 m: 1977. 