Question: The Selkirk Yard is a large reight railroad lacated in Selkirk, New York.What is the name of the 315 mile river that flows from north to south that runs near the Selkirk Yard.
Sentence (from "Selkirk Yard"): The yard is owned by CSX Transportation and is its major classification yard for the northeast United States and the gateway to points east of the Hudson River, including New York City.
Relevant evidence: Yes