<prompt> Kalima dǝga samnozǝyin: Gerhardt dǝye medal uwu-a kǝnasartǝ FIBT World Championships lan, kuru jabu-a yakkǝ-a Am indi:  <response>: 1981, Four-man: 1977, 1981, silver fal Four-man: 1979, kuru bronze fal Four-man: 1978. 