I want to know the answer to the following question:
Who annexed Alsace to the new German Empire in 1871?
All the background I'm provided with is that "Otto von Bismarck annexed Alsace and northern Lorraine to the new German Empire in 1871; unlike other members states of the German federation, which had governments of their own, the new Imperial territory of Alsace-Lorraine was under the sole authority of the Kaiser, administered directly by the imperial government in Berlin.". Is that enough to answer the question?