Complex sentence: The Chester Cup is a flat horse race in the United Kingdom for four-year-old and above thoroughbreds run over a distance of 2 mile 2 furlongs and 147 yards (3,755 metres) at Chester Racecourse in May.
Split into simpler sentences: The Chester Cup is a flat horse race in the United Kingdom for four-year-old and above thoroughbreds. It is run over a distance of 2 mile 2 furlongs and 147 yards (3,755 metres) at Chester Racecourse in May.