Complex sentence: The Blue Riband Trial Stakes is a flat horse race in the United Kingdom for three-year-old thoroughbreds run over a distance of 1 mile 2 furlongs and 18 yards (2,028 metres) at Epsom Downs Racecourse in late April.
Split into simpler sentences: The Blue Riband Trial Stakes is a flat horse race in the United Kingdom for three-year-old thoroughbreds. It is run over a distance of 1 mile 2 furlongs and 18 yards (2,028 metres) at Epsom Downs Racecourse in late April.