Complex sentence: The "Super Chief" makes its first regular run with EMC E1s 2A and 2B, the first locomotives to wear the famous red, yellow and silver "Warbonnet" scheme.
Split into simpler sentences: The "Super Chief" makes its first regular run with EMC E1s 2A and 2B. They are the first locomotives to wear the famous red, yellow and silver "Warbonnet" scheme.