Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=81, y1=307, x2=120, y2=348
  2: Rectangle: x1=108, y1=393, x2=160, y2=446
  3: Rectangle: x1=131, y1=489, x2=194, y2=554
  4: Rectangle: x1=159, y1=549, x2=230, y2=623