Complex sentence: The Gold Cup was the first of the festivals four Championship races, with the Champion Hurdle being introduced in 1927, the Queen Mother Champion Chase in 1959, and finally the Stayers Hurdle, which was first run in 1972.
Split into simpler sentences: The Gold Cup was the first of the four Championship races, before the Champion Hurdle was introduced in 1927. The Queen Mother Champion Chase was introduced in 1959 before the Stayers Hurdle, the last of the championship was first run in 1972.