<prompt> Qedela umusho olandelayo: UGustaaf Guus Bierings owazalwa ngo-28 Septhemba 1956 ungumgibeli wamabhayisikili waseDashi osethathe umhlalaphansi owayesebenza phakathi kuka-1975 no-1981. Wayeyingxenye yamaqembu aseNetherlands awina i-  <response>: 1978 UCI Road World Championships futhi waqeda endaweni 15 ngesikhathi 1980 Summer Olympics e ithimba isikhathi trial. Wabuye wanqoba isigaba esisodwa se-Olympias Tour ngo-1977. 