Complex sentence: The Castleford Chase is a National Hunt handicap chase in the United Kingdom for five-year-old and above horses run over a distance of 2 miles (3,219 metres) at Wetherby Racecourse in December.
Split into simpler sentences: The Castleford Chase is a National Hunt handicap chase in the United Kingdom for five-year-old and above horses. It is run over a distance of 2 miles (3,219 metres) at Wetherby Racecourse in December.