Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=106, y1=578, x2=131, y2=602
  2: Rectangle: x1=137, y1=742, x2=170, y2=775
  3: Rectangle: x1=168, y1=913, x2=208, y2=953
  4: Rectangle: x1=190, y1=1036, x2=236, y2=1082