Complex sentence: The third colt, Rampage, having won his maiden decisively, was strongly fancied to land the Norfolk Stakes even against such good horses as Deep Diver and Philipp of Spain; challenging at the furlong pole he stumbled and died of a heart attack.
Split into simpler sentences: The third colt, Rampage, having won his maiden decisively, was strongly fancied to land the Norfolk Stakes even against such good horses as Deep Diver and Philipp of Spain. Challenging at the furlong pole he stumbled and died of a heart attack.