Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=33, y1=508, x2=55, y2=536
  2: Rectangle: x1=37, y1=652, x2=57, y2=684
  3: Rectangle: x1=51, y1=798, x2=75, y2=839
  4: Rectangle: x1=59, y1=907, x2=85, y2=952