Complex sentence: With now nearly of track in and around the downtown Cleveland area, the Erie Railroad thought they ought to step in, which they did, purchasing of property, and built a line from Cleveland to Connellsville, PA (just south of Pittsburgh).
Split into simpler sentences: With now nearly of track in and around the downtown Cleveland area, the Erie Railroad thought they ought to step in, which they did. Purchased of property, and built a line from Cleveland to Connelsville, PA (just south of Pittsburgh).