Complex sentence: Bergvall wanted to improve on the traditional knockout method used in Olympic competitions: believing that this was only fair in deciding the gold medal winner, Bergvall advocated separate competitions should also be held for the silver and bronze medals.
Split into simpler sentences: Bergvall wanted to improve on the traditional knockout method used in Olympic competitions. Believing that this was only fair in deciding the gold medal winner, Bergvall advocated separate competitions should also be held for the silver and bronze medals.