Complex sentence: The Prix du Prince d'Orange is a Group 3 flat horse race in France for three-year-old thoroughbreds run over a distance of 2,000 metres (approximately 1 mile 2 furlongs) at Longchamp Racecourse in September.
Split into simpler sentences: The Prix du Prince d'Orange is a Group 3 flat horse race in France for three-year-old thoroughbreds. It is run over a distance of 2,000 metres (approximately 1 mile 2 furlongs) at Longchamp Racecourse in September.