[ Header
    1
    ( "single-column" , [] , [] )
    [ Str "Single" , Space , Str "column" ]
, Div
    ( "" , [ "columns" ] , [] )
    [ Div
        ( "" , [ "column" ] , [] )
        [ Para [ Str "One" , Space , Str "paragraph." ]
        , Para [ Str "Another" , Space , Str "paragraph." ]
        ]
    ]
]