Complex sentence: The Cornwallis Stakes is a Group 3 flat horse race in the United Kingdom for two-year-old thoroughbreds run over a distance of 5 furlongs (1,006 metres) at Ascot Racecourse in October.
Split into simpler sentences: The Cornwallis Stakes is a Group 3 flat horse race in the United Kingdom for two-year-old thoroughbreds. It is run over a distance of 5 furlongs (1,006 metres) at Ascot Racecourse in October.