((output
  (((f.ml (1 0) (1 9))
    (paragraph
     (((f.ml (1 0) (1 4)) (word @see)) ((f.ml (1 4) (1 5)) space)
      ((f.ml (1 5) (1 9)) (word 'foo)))))))
 (warnings
  ( "File \"f.ml\", line 1, characters 0-4:\
   \n'@see' should be followed by <url>, 'file', or \"document title\".")))
