<prompt> Ngwala tšwetšopele ya serapa se - Roland Graupner ke mosesiši wa seketswana wa Jeremane Bohlabela yo a ilego a phenkgišana mafelelong a bo-1970. O thopile dimetale tše pedi tša gauta ka K-4 500 m ka ICF Canoe Sprint World Championships, a di hwetša ka 1978  <response>: le 1979. 