Question: The Ironton Railroad became part of which Class 1 Railroad Corporation?
Sentence (from "Delaware, Lackawanna and Western Railroad"): The Delaware, Lackawanna & Western Railroad (or Delaware, Lackawanna & Western Railroad Company and also known as the DL&W or Lackawanna Railroad) was a U.S. Class 1 railroad that connected Buffalo, New York, and Hoboken, New Jersey, a distance of about 400 mi .
Relevant evidence: No