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

[^1]: the first note.

[^2]: the second, unused, note.
^D
2> [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 "."
    ]
]
```