Complex sentence: Continuing south, Halsted passes along the Canaryville neighborhood between 40th and 49th Streets, which historically housed many workers employed at Chicago's Union Stock Yards, located to the west of Halsted between Pershing (39th) and 47th.
Split into simpler sentences: Continuing south, Halsted passes along the borders of the Canaryville neighborhood between 40th and 49th Streets, which historically housed many Union Stock Yards workers. The Stockyards themselves were located to the west of Halsted between Pershing (39th) and 47th.