Complex sentence: The Great Southern Automobile Company, the first automobile manufacturer in the central South, was incorporated in Birmingham, AL in 1909 and manufactured automobiles, automobile parts, and buses from its plant in Ensley, AL where it also maintained a repair department.
Split into simpler sentences: The Great Southern Automobile Company was the first automobile manufacturer in the central South. It was incorporated in Birmingham, Alabama, in 1909 and manufactured automobiles, automobile parts, and buses from its plant in Ensley, where it also maintained a repair department.