Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=406, y1=493, x2=458, y2=545
  2: Rectangle: x1=533, y1=639, x2=589, y2=695
  3: Rectangle: x1=656, y1=786, x2=727, y2=854
  4: Rectangle: x1=740, y1=892, x2=817, y2=969