Complex sentence: The World Hurdle is a Grade 1 National Hunt horse race in the United Kingdom for four-year-old and above horses run over a distance of 3 miles (4,828 metres) on the New Course at Cheltenham Racecourse during the Cheltenham Festival in March.
Split into simpler sentences: The World Hurdle is a Grade 1 National Hunt horse race in the United Kingdom for four-year-old and above horses. It is run over a distance of 3 miles (4,828 metres) on the New Course at Cheltenham Racecourse during the Cheltenham Festival in March.