Complex sentence: It was constructed as a wood-burning 0-4-0 saddle-tank engine with a balloon chimney that contained a spark arrester and with a fuel rack mounted on top of the tank ahead of the cab.
Split into simpler sentences: It was constructed as a wood-burning 0-4-0 saddle-tank engine with a balloon chimney that contained a spark arrester. The locomotive had a fuel rack mounted on top of the tank ahead of the cab.