I want to know the answer to the following question:
Where do the Amtrak and Coaster trains primarily run?
All the background I'm provided with is that "The Amtrak and Coaster trains currently run along the coastline and connect San Diego with Los Angeles, Orange County, Riverside, San Bernardino, and Ventura via Metrolink and the Pacific Surfliner.". Is that enough to answer the question?