Complex sentence: The National Stakes is a Group 1 flat horse race in the Republic of Ireland for two-year-old thoroughbred colts and fillies run over a distance of 7 furlongs (1,408 metres) at the Curragh in September.
Split into simpler sentences: The National Stakes is a Group 1 flat horse race in the Republic of Ireland for two-year-old thoroughbred colts and fillies. It is run over a distance of 7 furlongs (1,408 metres) at the Curragh in September.