Complex sentence: The Coronation Stakes is a Group 1 flat horse race in the United Kingdom for three-year-old thoroughbred fillies run over a distance of 1 mile at Ascot Racecourse during the Royal Ascot meeting in June.
Split into simpler sentences: The Coronation Stakes is a Group 1 flat horse race in the United Kingdom for three-year-old thoroughbred fillies. It is run over a distance of 1 mile at Ascot Racecourse during the Royal Ascot meeting in June.