Complex sentence: Eaton went on to run a personal best in the 1500 metres with a time of 4:14.48, finishing first and breaking Roman Šebrle's world record of 9026 with a points total of 9039 and subsequently Dan O'Brien's American record of 8891 previously set it 1992.
Split into simpler sentences: Eaton went on to run a personal best in the 1500 metres with a time of 4:14.48, finishing first and breaking Roman Šebrle's world record of 9026 with a points total of 9039. Eaton also broke Dan O'Brien's American record of 8891 previously set it 1992.