18th Street has a local subway station at the crossing with Seventh Avenue, served by the 1 2 trains on the IRT Broadway – Seventh Avenue Line. There used to be an 18th Street station on the IRT Lexington Avenue Line at the crossing with Park Avenue South.
Which train line do the 1 2 trains serve?
{'text': 'IRT Broadway – Seventh Avenue Line', 'answer_start': 108}