Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=351, y1=607, x2=373, y2=623
  2: Rectangle: x1=449, y1=784, x2=479, y2=805
  3: Rectangle: x1=550, y1=967, x2=588, y2=991
  4: Rectangle: x1=625, y1=1090, x2=667, y2=1118