Task: Explanation
Input (English): Perryville is a passenger rail station in Perryville, Maryland, served by MARC Train's Penn Line. The station is located on the southern part of the Northeast Corridor, however Amtrak does not service the station. A single Amtrak train—"Northeast Regional" #151—stops at Perryville to board MARC ticket holders. The station is also the northernmost in the MARC system and the terminus for the Penn Line. Question:  Perryville is a passenger rail station on the southern part of an electrified railway line that closely paralles what road for most of its length? Answer: Interstate 95
Output (English): Perryville is a passenger rail station in Perryville, Maryland, served by MARC Trains Penn Line.