Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=137, y1=578, x2=162, y2=602
  2: Rectangle: x1=178, y1=742, x2=211, y2=775
  3: Rectangle: x1=217, y1=913, x2=257, y2=953
  4: Rectangle: x1=246, y1=1036, x2=292, y2=1082