Definition: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: How many years did the war where Lyon served with the 2nd Battalion last? Passage:Lyon was commissioned as a Second Lieutenant into the 4th (Extra Reserve) Battalion, the North Staffordshire Regiment in February 1900, but two months later, in April of the same year, transferred to the 2nd Battalion of the regiment. The 2nd Battalion was a regular battalion and was at the time on active service in South Africa during the Second Boer War, where Lyon joined the battalion and served with it throughout the war being Mentioned in Despatches in 1901. He was promoted to lieutenant on 19 January 1901, while in South Africa. After peace was declared in May 1902, Lyon left Cape Town on board the SS Bavarian and arrived in the United Kingdom the following month. He remained with the 2nd Battalion when it was posted to India in 1903 where he became adjutant and was promoted to captain.


b