Complex sentence: On May 7,2017, the station was renamed from Downsview to Sheppard West in preparation for the opening of the TYSSE, and to avoid naming conflicts with the new Downsview Park station, both of which opened on December 17,2017.
Split into simpler sentences: On May 7,2017, the station was renamed from Downsview to Sheppard West. York Spadina Subway Extension (TYSSE), and to avoid naming conflicts with the new Downsview Park station, both of which opened on December 17,2017.