Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=168, y1=578, x2=193, y2=602
  2: Rectangle: x1=219, y1=742, x2=252, y2=775
  3: Rectangle: x1=266, y1=913, x2=306, y2=953
  4: Rectangle: x1=302, y1=1036, x2=348, y2=1082