Complex sentence: The "City of San Francisco" was a streamlined passenger train on the Chicago and North Western Railway, the Southern Pacific Railroad, and the Union Pacific Railroad between Chicago, Illinois and Oakland, California, with a ferry connection to San Francisco.
Split into simpler sentences: The "City of San Francisco" was a streamlined passenger train operated jointly by the Chicago and North Western Railway, the Southern Pacific Railroad, and the Union Pacific Railroad. The train ran between Chicago, Illinois and Oakland, California, with a ferry connection to San Francisco.