Complex sentence: The Ulster Derby is a flat horse race in Northern Ireland for three-year-old and above thoroughbreds run over a distance of 1 mile 4 furlongs and 190 yards (2,588 metres) at Down Royal racecourse in late June.
Split into simpler sentences: The Ulster Derby is a flat horse race in Northern Ireland for three-year-old and above thoroughbreds. It is run over a distance of 1 mile 4 furlongs and 190 yards (2,588 metres) at Down Royal racecourse in late June.