<prompt> Ngwala tšwetšopele ya serapa se - Hans Hiltebrand yo a belegwego ka la 18 Pherekgong 1945 ke sebapadi sa bob ya Switzerland yo a phenkgišanego go tloga mafelelong a bo-1970 go fihla mafelelong a bo-1980. O thopile dimetale tše hlano go FIBT World Championships ka gauta tše pedi Two-man: 1977, Four-man: 1987 le silifera tše tharo Two-man: 1982, 1987; Four-man: 1981  <response>: .. le 