((output
  (((f.ml (1 0) (2 4))
    (paragraph
     (((f.ml (1 0) (2 4))
       (bold
        (((f.ml (1 3) (1 6)) (word foo)) ((f.ml (1 6) (2 0)) space)
         ((f.ml (2 0) (2 3)) (word bar))))))))))
 (warnings ()))
