Complex sentence: Most notable for winning the 100 metres hurdles at the 1987 World Championships, with 12.25 seconds she held the world record for a year until it was beaten by Yordanka Donkova in August 1988.
Split into simpler sentences: Most notable for winning the 100 metres hurdles at the 1987 World Championships. She held the world record for a year with a time of 12.25 sec, until it was beaten by Yordanka Donkova in August 1988.