Complex sentence: The Cesarewitch is a famous flat handicap race in the United Kingdom for three-year-old and above thoroughbred horses, run over a distance of 2 miles 2 furlongs (3,621 metres) at Newmarket Racecourse in October.
Split into simpler sentences: The Cesarewitch is a famous flat handicap race in the United Kingdom for three-year-old and above thoroughbreds. It is run over a distance of 2 miles 2 furlongs (3,621 metres) at Newmarket Racecourse in October.