article ja "[明示的/めいじてき]な[改行/かいぎょう]"
body
  cons paragraph
    cons parallel
      cons variant ja sentence
        cons text "ここで"
        cons break
        cons ruby text "改行" text "かいぎょう"
        cons text "します。"
        nil
      cons variant en sentence
        cons text "This sentence continues"
        cons break
        cons text "on the next line."
        nil
      nil
    nil
  nil