[ Header
    1
    ( "single-column" , [] , [] )
    [ Str "Single" , Space , Str "column" ]
, Div
    ( "" , [ "columns" ] , [] )
    [ Div
        ( "" , [ "column" ] , [] )
        [ Figure
            ( "" , [] , [] )
            (Caption
               Nothing [ Plain [ Str "an" , Space , Str "image" ] ])
            [ Plain
                [ Image
                    ( "" , [] , [] )
                    [ Str "an" , Space , Str "image" ]
                    ( "lalune.jpg" , "" )
                ]
            ]
        ]
    ]
]