((output
  (((f.ml (1 0) (1 19))
    (paragraph
     (((f.ml (1 0) (1 19))
       (reference (root foo unknown)
        (((f.ml (1 8) (1 18))
          (emphasis (((f.ml (1 11) (1 17)) (emphasis ())))))))))))))
 (warnings
  ( "File \"f.ml\", line 1, characters 11-17:\
   \n'{!...}' (cross-reference) is not allowed in '{{!...} ...}' (cross-reference).")))
