Complex sentence: In 1986 Stenzel competed at Ironman Triathlon World Championship in Kona, Hawaii and between 1987 and 1988 Stenzel competed at the Grundig Challenge Mountain Bike World Cups in Davos, Switzerland and Kaprun, Austria.
Split into simpler sentences: In 1986 Stenzel competed at Ironman Triathlon World Championship in Kona, Hawaii. In 1987 and 1988 Stenzel competed at the Grundig Challenge Mountain Bike World Cups in Davos, Switzerland and Kaprun, Austria.