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.

Ex Input:
Question: How long did the war that the North Irish Horse unit was raised in the aftermath of last? Passage:The North Irish Horse is a yeomanry unit of the British Territorial Army raised in the northern counties of Ireland in the aftermath of the Second Boer War. Raised and patronized by the nobility from its inception to the present day, it was one of the first non-regular units to be deployed to France and the Low Counties with the British Expeditionary Force in 1914 during World War I and fought with distinction both as mounted troops and later as a Cyclist Regiment, achieving 18 battle honours. The regiment was reduced to a single man in the inter war years and re-raised for World War II, when it achieved its greatest distinctions in the North African and Italian campaigns. Reduced again after the Cold War, the regiment's name still exists in B (North Irish Horse) Squadron, the Scottish and North Irish Yeomanry and 40 (North Irish Horse) Signal Squadron, part of 32 Signal Regiment.


Ex Output:
b


Ex Input:
Question: In what year was Columbia University founded? Passage:Columbia (; ) is the female personification of the United States. It was also a historical name used to describe the Americas and the New World. It has given rise to the names of many persons, places, objects, institutions and companies; for example: Columbia University, the District of Columbia (the national capital of the United States), and the ship Columbia Rediviva, which would give its name to the Columbia River. Images of the Statue of Liberty largely displaced personified Columbia as the female symbol of the United States by around 1920, although Lady Liberty was seen as an aspect of Columbia. The District of Columbia is named after the personification, as is the traditional patriotic hymn "Hail Columbia", which is the official vice presidential anthem of the United States Vice President.


Ex Output:
b


Ex Input:
Question: How many errors did Don Hoak commit in the 1959 season? Passage:On May 26, 1959, in the 13th inning of a game against the Pittsburgh Pirates at Milwaukee County Stadium, Mantilla ruined Harvey Haddix's bid for a perfect game. Leading off the inning, he hit a ground ball to third baseman Don Hoak, whose throw to first pulled Rocky Nelson off the bag for an error. (Mantilla had not even been in the starting lineup; he entered the game in the 11th after Del Rice had pinch-hit for Johnny O'Brien.) Mantilla was sacrificed to second by Eddie Mathews, followed by an intentional walk to Hank Aaron. The following batter, Joe Adcock, hit one over the right-center field wall, just beyond the reach of right fielder Joe Christopher (who was making his Major League debut), for an apparent 3–0 victory. Mantilla scored the winning run, but Aaron, thinking the ball was still in play and that the game ended when Mantilla scored the winning run, rounded second and then headed for the dugout. Adcock, running out his home run, passed Aaron on the bases; as a result, the ruling from National League president Warren Giles was that Adcock's hit was a double (not a home run), only Mantilla's run counted and the final score was 1–0. 


Ex Output:

a