Complex sentence: The Prix Saint-Alary is a Group 1 flat horse race in France for three-year-old thoroughbred fillies run over a distance of 2,000 metres (approximately 1 mile 2 furlongs) at Longchamp Racecourse in May.
Split into simpler sentences: The Prix Saint-Alary is a Group 1 flat horse race in France for three-year-old thoroughbred fillies. It is run over a distance of 2,000 metres (approximately 1 mile 2 furlongs) at Longchamp Racecourse in May.