Question: Yuma is an Amtrak station with passenger rail service provided thrice-weekly by a train that for most of its history has run between what two cities?
Sentence (from "Maricopa station"): Maricopa was added as a stop after Amtrak was forced to withdraw from Union Station in Phoenix due to deteriorated track conditions on a secondary Union Pacific Railroad line which diverged from the mainline to serve Phoenix.
Relevant evidence: No