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'.

Context: In 1861 he was violently attacked in a pamphlet by Karl Twesten (18201870), a Liberal leader, whom he had wounded in a duel, for which Manteuffel insisted on being briefly imprisoned. Link Information: none Question: What type of weapon did von Manteuffel and Karl Twesten use in their duel?
Answer: none