Complex sentence: The Breeders' Stakes is a South Australian Jockey Club Group 3 Thoroughbred horse race for two years olds, over a distance of 1200 metres, held annually at Morphettville Racecourse in Adelaide during the autumn.
Split into simpler sentences: The Breeders' Stakes is a South Australian Jockey Club Group 3 Australian Thoroughbred horse race for horses aged two years old, over a distance of 1200 metres. It is held annually at Morphettville Racecourse in Adelaide during the autumn.