((output
  (((f.ml (1 0) (1 25))
    (paragraph
     (((f.ml (1 0) (1 25))
       (reference (root foo unknown)
        (((f.ml (1 8) (1 24))
          (emphasis
           (((f.ml (1 11) (1 23))
             (emphasis (((f.ml (1 19) (1 22)) (word baz))))))))))))))))
 (warnings
  ( "File \"f.ml\", line 1, characters 11-23:\
   \n'{{:...} ...}' (external link) is not allowed in '{{!...} ...}' (cross-reference).")))
