シュレースヴィヒ＝ホルシュタイン問題
In any case, because of the mix of Danes and Germans who lived there and the various feudal obligations of the players, the Schleswig-Holstein Question problem was considered intractable by many. Lord Palmerston said of the issue that only three people understood the Schleswig-Holstein question: one was dead, the other had gone insane, and the third was himself, but he had forgotten it.