Complex sentence: The Prix de Sandringham is a Group 2 flat horse race in France for three-year-old thoroughbred fillies run over a distance of 1,600 metres (approximately 1 mile) at Chantilly Racecourse in late May/early June.
Split into simpler sentences: The Prix de Sandringham is a Group 2 flat horse race in France for three-year-old thoroughbred fillies. It is run over a distance of 1,600 metres (approximately 1 mile) at Chantilly Racecourse in late May or early June.