```
% pandoc -t native
Note[^1].

[^1]: the first note.

[^2]: the second, unused, note.
^D
[WARNING] Note with key '2' defined at line 5 column 1 but not used.
[ Para
  [ Str "Note"
  , Note
    [ Para [ Str "the", Space, Str "first", Space, Str "note." ] ]
  , Str "."
  ]
]
```