Pandoc
  Meta { unMeta = fromList [] }
  [ Header
      1 ( "" , [] , [] ) [ Str "Heading" , Space , Str "1" ]
  , Header
      2 ( "" , [] , [] ) [ Str "Heading" , Space , Str "2" ]
  , Header
      3 ( "" , [] , [] ) [ Str "Heading" , Space , Str "3" ]
  , Para [ Str "Paragraph" ]
  ]