Complex sentence: In the early 1980s, after two decades on the road, Stücke decided to attempt to visit every country in the world and by 2006 he had cycled more than 539,000 kilometres since 1962 and visited 165 countries.
Split into simpler sentences: In the early 1980s, after two decades on the road, Stücke decided to attempt to visit every country in the world. By 2006 he had cycled more than 539,000 kilometres since 1962, and had visited 165 countries.