Complex sentence: Abdul Karim Daoud (19 August 1970) is a former athlete, who represented North Yemen at the 1988 Summer Olympic Games in the Men's 10,000m, he finished 21st in his heat and failed to advance.
Split into simpler sentences: Abdul Karim Daoud (born 19 August 1970) is a former Yemeni track and field athlete, who competed in long-distance running. He represented North Yemen at the 1988 Summer Olympic Games in the men's 10,000 metres and finished 21st in his heat, failing to advance.