Complex sentence: The Yonkers Metro-North Railroad station serves the residents of downtown Yonkers, New York via the Hudson Line and is one of four express stations on that line south of Croton-Harmon seeing most trains minus peak hour trains to/from Poughkeepsie.
Split into simpler sentences: The Yonkers Metro-North Railroad station serves the downtown area of Yonkers, New York via the Hudson Line. It is one of four express stations on that line south of Croton-Harmon, seeing most trains minus peak hour trains to/from Poughkeepsie.