Complex sentence: The Queen's Plate is North America's oldest thoroughbred horse race, run at a distance of 1¼ miles for 3-year-old thoroughbed horses, foaled in Canada, run annually in July at Woodbine Racetrack, Etobicoke (Toronto), Ontario.
Split into simpler sentences: The Queen's Plate is North America's oldest thoroughbred horse race, run at a distance of 1¼ miles for 3-year-old thoroughbed horses, foaled in Canada. The race takes place each July at Woodbine Racetrack, Etobicoke (Toronto), Ontario.