<prompt> Feleletša polelo ye e latelago: Gerhardt gape o thopile dimetale tše hlano go FIBT World Championships ka gauta e meraro Banna ba babedi:  <response>: 1981, Four-man: 1977, 1981, e tee ya silifera Four-man: 1979, le e tee ya bronze Four-man: 1978. 