Complex sentence: Justin Gatlin (born February 10,1982) is an American sprinter who is an Olympic gold medalist with a 100 m personal best of 9.79 seconds, and a two-time World indoor champion in the 60-meter dash.
Split into simpler sentences: Justin Gatlin (born February 10,1982) is an American sprinter who is an Olympic gold medalist in the 100 meters. His 100 m personal best is 9.79 seconds, and he is a two-time World indoor champion in the 60-meter dash.