Complex sentence: The Firth of Clyde Stakes is a Group 3 flat horse race in the United Kingdom for two-year-old thoroughbred fillies run over a distance of 6 furlongs (1,207 metres) at Ayr Racecourse in September.
Split into simpler sentences: The Firth of Clyde Stakes is a Group 3 flat horse race in the United Kingdom for two-year-old thoroughbred fillies. It is run over a distance of 6 furlongs (1,207 metres) at Ayr Racecourse in September.