sentences:  Wieser's first success came at an early age, when he became the East German 10 kilometer walk Youth Champion in 1971.In 1975 he became the European Junior Champion in the same event.In 1978, Weiser competed in the East German National Championship and won the 50 kilometer walk; in the same year he achieved his first major success when he became the European Champion in the 20 kilometer walk at the elite level with a time of 1