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.

Example Input: Question: How long was the fortification that the German Army retreated to? Passage:Adair fought in the First World War. He joined the British Army, receiving his commission as a probationary second lieutenant on 2 May 1916 in the 5th (Reserve) Battalion of the Grenadier Guards. From January 1917 onwards he served in the trenches of the Western Front in France and Belgium as part of the 2nd Company, 3rd Battalion, Grenadier Guards, with the rank of lieutenant. The battalion was part of the 2nd Guards Brigade of the Guards Division. Adair's first major battle was in the pursuit of the retreating German Army to the Hindenburg Line. The division then took part in the Battle of Passchendaele. Adair, however, took no part in the battle, due to an injury sustained in a bicycle accident in early July 1917. He returned to the battalion in January 1918.

Example Output: b

Example Input: Question: How tall is Mount Weeks? Passage:According to the United States Census Bureau, the city has a total area of , of which is land and is water, comprising 1.35% of the city. Berlin is situated at the confluence of the Androscoggin and Dead rivers. The Mahoosuc Range is to the southeast. Jericho Mountain State Park, created from a city park and from private land in 2005, is west of the city center and features a reservoir created in the 1970s and a network of ATV trails. The city's highest point is Mount Weeks, at above sea level. A prominent feature in the landscape of Berlin is Mount Forist, rising over the west side of the city. Approximately half of Berlin lies within the Connecticut River watershed, and half lies in the Androscoggin River watershed.

Example Output: a

Example Input: Question: How many years did it take Philippe Leclerc de Hauteclocque
to graduate from the Ecole speciale militaire de Saint-Cyr in 1924? Passage:The son of an aristocratic family, de Hauteclocque graduated from the Ecole speciale militaire de Saint-Cyr, the French military academy, in 1924. After service with the French Occupation of the Ruhr and in Morocco, he returned to Saint-Cyr as an instructor. He was awarded the croix de guerre des theatres d'operations exterieures for leading goumiers in an attack on caves and ravines on Bou Amdoun on 11 August 1933. During the Second World War he fought in the Battle of France. He then became one of the first to make his way to Britain to fight with the Free French under General Charles de Gaulle, adopting the nom de guerre of Leclerc so that his wife and children would not be put at risk if his name appeared in the papers. He was sent to French Equatorial Africa, where he rallied local leaders to the Free French cause, and led a force against Gabon, whose leaders supported Vichy France. From Chad he led raids into Italian-controlled Libya. After his forces captured Kufra, he had his men swear an oath known today as the Serment de Koufra, in which they pledged to fight on until their flag flew over the Strasbourg Cathedral.

Example Output:
a