Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=152, y1=521, x2=177, y2=545
  2: Rectangle: x1=195, y1=668, x2=228, y2=701
  3: Rectangle: x1=241, y1=822, x2=281, y2=862
  4: Rectangle: x1=271, y1=933, x2=317, y2=979