Predicted giant arcs from the lens model when the smallest counterimage of system 5 is used as a template. The small inset in the bottom-left part of panel A’ shows the template. Panels A’, B’ and C’ in the bottom part of the figure show the predicted counterimages from this template. Panels A, B, and C show the data version in the same portion of the sky as in panels A’, B’, C’. We note that the predicted central counterimage C’ has not been identified spectroscopically, but small blue knots can be found near the center of the BCG.