Complex sentence: He is considered to be one of the greatest Thoroughbreds of all time, ranking second behind Man o'War in The Blood-Horse's List of the Top 100 U.S. Racehorses of the 20th Century.
Split into simpler sentences: He is considered to be one of the greatest Thoroughbreds of all time. He ranked second behind Man o'War in The Blood-Horse's List of the Top 100 U.S. Racehorses of the 20th Century.