Teacher:In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Teacher: Now, understand the problem? Solve this instance: Context: the Congress of Vienna awarded a great swathe of territory in this region to the Kingdom of Bavaria, Link Information: With Austria's defeat in the Austro-Prussian War, the northern German states quickly unified into the North German Confederation, with the Prussian king leading the state. Bavaria's previous inhibitions towards Prussia changed, along with those of many of the south German states, after French emperor Napoleon III began speaking of France's need for "compensation" from its loss in 1814 and included Bavarian-held Palatinate as part of its territorial claims. Ludwig II joined an alliance with Prussia in 1870 Question: How long did the Kingdom of Bavaria remain independent after the Congress of Vienna?
Student:
Answer: 53