. "The Schleswig-Holstein Question (German: Schleswig-Holsteinische Frage; Danish: Sp\u00F8rgsm\u00E5let om S\u00F8nderjylland og Holsten) was a complex set of diplomatic and other issues arising in the 19th century from the relations of two duchies, Schleswig (Danish: S\u00F8nderjylland/Slesvig) and Holstein (Danish: Holsten), to the Danish crown and to the German Confederation."@en . .