Complex sentence: Formerly, the West Side Line went as far south as a railroad terminal to Spring Street just north of Canal Street, however most of the lower section was demolished in 1960, with another small portion of the lower section being demolished in 1991.
Split into simpler sentences: Formerly, the West Side Line went as far south as a railroad terminal at Spring Street, just north of Canal Street. However, most of the southern section was demolished in 1960, with another small portion being demolished in 1991.