Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=90, y1=521, x2=115, y2=545
  2: Rectangle: x1=113, y1=668, x2=146, y2=701
  3: Rectangle: x1=143, y1=822, x2=183, y2=862
  4: Rectangle: x1=157, y1=933, x2=203, y2=979