Sentence:  A pioneer 4-8-4 operator, <WSD>Lackawanna</WSD> introduced a 77-inch-drivered Pocono (as DL&W dubbed it) in 1927 for passenger service, was soon buying a 70-inch version for Hoboken-Buffalo freight runs, finally achieved a 74-inch dual-purpose machine. 
Meaning of the word marked with <WSD> tags:  a short name for the (Delaware, Lackawanna and Western Railroad), which was merged into the (Erie Lackawanna Railroad) in 1960.