Question: The Las Vegas and Tonopah Railroad was a 197.9 mile railroad.that ran northwest from a connection with the mainline of the San Pedro, Los Angeles and Salt Lake Railroad at Las Vegas, Nevada, the SPLA&SL railroad later became part of which freight hauling railroad that operates 8,500 locomotives over 32,100 route-miles in 23 states west of Chicago and New Orleans?
Sentence (from "Las Vegas and Tonopah Railroad"): The SPLA&SL railroad later became part of the Union Pacific Railroad and serves as their mainline between Los Angeles and Salt Lake City.
Relevant evidence: Yes