Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=464, y1=493, x2=516, y2=545
  2: Rectangle: x1=609, y1=639, x2=665, y2=695
  3: Rectangle: x1=750, y1=786, x2=821, y2=854
  4: Rectangle: x1=843, y1=892, x2=922, y2=969