Complex sentence: Raced Aqueduct Race Track from 1963 to 1967, in 2008 it would have been in its 51st running but has been replaced in its summer spot by the Man o' War Stakes moved from a fall schedule to improve turf scheduling competition.
Split into simpler sentences: Raced Aqueduct Race Track from 1963 to 1967, in 2008 it would have been in its 51st running but was replaced in its summer spot by the Man o'War Stakes. The Man o' War was moved from a fall schedule to improve turf scheduling competition.