Complex sentence: The Gunfight at the O.K. Corral was a 30-second gunfight between an outlaw group of Cowboys and lawmen that is generally regarded as the most famous shootout in the history of the American Wild West.
Split into simpler sentences: The Gunfight at the O.K. Corral was a 30-second gunfight between an outlaw group of Cowboys and lawmen. It is generally regarded as the most famous shootout in the history of the American Wild West.