<prompt> Kalima dǝwo fuwunzǝ dǝga samzǝ: Roland Graupner dǝ shima kam do East German lan bowotǝma dǝwo suro dareram 1970s dǝlan kǝla kǝla kǝnǝngatǝye dǝn kǝla kǝnǝngatǝye dǝro kǝla kǝnǝngatǝye dǝn. Shiye kazәyiya zәlbe indi suro K-4 500 m event dәn suwudәna suro ICF Canoe Sprint World Championships dәn.  <response>: Saa 1978-a saa 1979-a. 