Complex sentence: The Criterion Stakes is a Group 3 flat horse race in the United Kingdom for three-year-old and above thoroughbreds run over a distance of 7 furlongs (1,408 metres) at Newmarket's July course in late June or early July.
Split into simpler sentences: The Criterion 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 7 furlongs (1,408 metres) at Newmarket's July course in late June or early July.