Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=515, y1=272, x2=553, y2=285
  2: Rectangle: x1=668, y1=345, x2=718, y2=362
  3: Rectangle: x1=823, y1=424, x2=885, y2=446
  4: Rectangle: x1=926, y1=486, x2=995, y2=510