((output
  (((f.ml (1 0) (1 10))
    (2
     (label
      ((root (f.ml (page f.ml) 00000000000000000000000000000000) f.ml)
       (label "")))
     (((f.ml (1 3) (1 9)) (emphasis ())))))))
 (warnings
  ( "File \"f.ml\", line 1, characters 3-9:\
   \n'{!...}' (cross-reference) is not allowed in '{2 ...}' (section heading).")))
