Complex sentence: The GS-3 is a semi-streamlined 4-8-4 Northern type steam locomotive that served the Southern Pacific Railroad from 1937 to 1957 and were built by Lima Locomotive Works and were numbered 4416 through 4429.
Split into simpler sentences: The GS-3 is a semi-streamlined 4-8-4 Northern type steam locomotive that served the Southern Pacific Railroad from 1937 to 1957. They were built by Lima Locomotive Works and were numbered 4416 through 4429.