Complex sentence: Lee Myung-Sun (born 12 February 1976) is a retired South Korean shot putter, who's personal best throw is 19.36 metres, achieved in April 2000 in Shanghai.
Split into simpler sentences: Lee Myung-Sun (born 12 February 1976) is a retired South Korean shot putter. Her personal best throw is 19.36 metres, achieved in April 2000 in Shanghai.