Question: What is the fastest speed attained by Amtrak's one of the two services (the other being "Northeast Regional") that serve Westbrook?
Sentence (from "1987 Maryland train collision"): The 1987 Maryland train collision occurred at 1:30 pm on January 4, 1987, on Amtrak's Northeast Corridor main line in the Chase community in eastern Baltimore County, Maryland, United States, at Gunpowder Interlocking, about 18 mi northeast of Baltimore.
Relevant evidence: No