Complex sentence: Southern Pacific Railroad (SP) 1215 was originally assigned to the Dunsmuir rail yard near Mt Shasta, locomotive 1215 primarily worked for the Western Division of the Southern Pacific Railroad from Oakland, Sacramento and Bakersfield.
Split into simpler sentences: Southern Pacific Railroad (SP) 1215 was originally assigned to the Dunsmuir rail yard near Mt Shasta. The locomotive was primarily used on the Western Division of the Southern Pacific Railroad, working from Oakland, Sacramento and Bakersfield.