Complex sentence: The Dewhurst Stakes is a Group 1 flat horse race in the United Kingdom for two-year-old thoroughbred colts and fillies run over a distance of 7 furlongs (1,408 metres) at Newmarket's Rowley Mile course in October.
Split into simpler sentences: The Dewhurst Stakes is a Group 1 flat horse race in the United Kingdom for two-year-old thoroughbred colts and fillies. It is run over a distance of 7 furlongs (1,408 metres) at Newmarket's Rowley Mile course in October.