Complex sentence: The Eclipse Stakes is a Group 1 flat horse race in the United Kingdom for three-year-old and above thoroughbreds run over a distance of 1 mile 2 furlongs and 7 yards (2,018 metres) at Sandown Park Racecourse in early July.
Split into simpler sentences: The Eclipse Stakes is a Group 1 flat horse race in the United Kingdom for three-year-old and above thoroughbreds. It is run over a distance of 1 mile 2 furlongs and 7 yards (2,018 metres) at Sandown Park Racecourse in early July.