Complex sentence: The line's largest yard, (Blue Island) is located in Riverdale, Illinois with other yards in Burnham, Calumet City, Alsip, Argo, LaGrange, Rose and Franklin Park.
Split into simpler sentences: The line's largest yard, Blue Island, is located in Riverdale, Illinois. Other yard in Illinois are Burnham, Calumet City, Alsip, Argo, LaGrange, Rose and Franklin Park.