Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Question: How long did the civil unrest that saw Quesnel promoted to sergeant major last? Passage:Quesnel was born on 18 January 1765 in Saint-Germain-en-Laye which is now part of Yvelines department near Paris. He enlisted in the 25th Infantry Regiment in the French Royal Army on 18 July 1782. He was promoted to corporal on 18 September 1783, sergeant on 10 October 1784, and farrier on 7 July 1786. After the outbreak of the French Revolution he advanced in rank to sergeant major on 12 September 1789 and sous lieutenant on 15 September 1791. After this, his promotions followed with dizzying swiftness. He became a lieutenant of grenadiers on 19 April 1792 and captain on 1 May of the same year. Promotion to adjutant general chef de bataillon came on 15 May 1793 and adjutant general chef de brigade on 30 September 1793. He became a general of brigade on 26 December 1793.

Student:
b