Complex sentence: The Darley Stakes is a Group 3 flat horse race in the United Kingdom for three-year-old and above thoroughbreds run over a distance of 1 mile and 1 furlong (1,811 metres) at Newmarket's Rowley Mile course in mid October.
Split into simpler sentences: The Darley Stakes is a Group 3 flat horse race in the United Kingdom for three-year-old and above thoroughbreds. It is run over a distance of 1 mile and 1 furlong (1,811 metres) at Newmarket's Rowley Mile course in mid October.