Complex sentence: The Welsh National is a Grade 3 National Hunt horse race in the United Kingdom for five-year-old and above horses run over a distance of 3 miles 5½ furlongs (5,934 metres) at Chepstow Racecourse, Wales in late December.
Split into simpler sentences: The Welsh National is a Grade 3 National Hunt horse race in the United Kingdom for five-year-old and above horses. It is run over a distance of 3 miles 5½ furlongs (5,934 metres) at Chepstow Racecourse, Wales in late December.