Complex sentence: In 1877, the Florence, El Dorado, and Walnut Valley Railroad Company built a branch line from Florence to El Dorado, in 1881 it was extended to Douglass, and later to Arkansas City.
Split into simpler sentences: In 1877, the Florence, El Dorado, and Walnut Valley Railroad Company built a branch line from Florence to El Dorado. In 1881 it was extended to Douglass, and later to Arkansas City.