Complex sentence: To help facilitate development, the City's plan called for an extension of the to a 34th Street subway station under Eleventh Avenue, adjacent to the Jacob K. Javits Convention Center; formerly, there was to be another station at Tenth Avenue and 41st Street.
Split into simpler sentences: To help facilitate development, the City's plan called for an extension of the to a 34th Street subway station under Eleventh Avenue, adjacent to the Jacob K. Javits Convention Center. Formerly, there was to be another station at Tenth Avenue and 41st Street.