((output
  (((f.ml (1 0) (1 6))
    (3
     (label
      ((root (f.ml (page f.ml) 00000000000000000000000000000000) f.ml)
       (label foo)))
     (((f.ml (1 2) (1 5)) (word Foo)))))))
 (warnings
  ( "File \"f.ml\", line 1, characters 0-2:\
   \n'{3' should be followed by space, a tab, or a new line.")))
