```
% pandoc -f latex -t native
\begin{tabular}{c c}
  \begin{tabular}{c} a \\ \end{tabular}
  &
  \\
\end{tabular}
^D
[ Table
    ( "" , [] , [] )
    (Caption Nothing [])
    [ ( AlignCenter , ColWidthDefault )
    , ( AlignCenter , ColWidthDefault )
    ]
    (TableHead ( "" , [] , [] ) [])
    [ TableBody
        ( "" , [] , [] )
        (RowHeadColumns 0)
        []
        [ Row
            ( "" , [] , [] )
            [ Cell
                ( "" , [] , [] )
                AlignDefault
                (RowSpan 1)
                (ColSpan 1)
                [ Table
                    ( "" , [] , [] )
                    (Caption Nothing [])
                    [ ( AlignCenter , ColWidthDefault ) ]
                    (TableHead ( "" , [] , [] ) [])
                    [ TableBody
                        ( "" , [] , [] )
                        (RowHeadColumns 0)
                        []
                        [ Row
                            ( "" , [] , [] )
                            [ Cell
                                ( "" , [] , [] )
                                AlignDefault
                                (RowSpan 1)
                                (ColSpan 1)
                                [ Plain [ Str "a" ] ]
                            ]
                        ]
                    ]
                    (TableFoot ( "" , [] , [] ) [])
                ]
            , Cell
                ( "" , [] , [] ) AlignDefault (RowSpan 1) (ColSpan 1) []
            ]
        ]
    ]
    (TableFoot ( "" , [] , [] ) [])
]
```