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: Did Sargis Tmogveli survive the capture of the city of Kars? Passage:Shalva was one of the most notable military commanders during a series of expansionist wars waged by the Kingdom of Georgia under Queen Tamar (r. 1184–1213). He consecutively held top posts of mechurchletukhutsesi (Lord High Treasurer) and mandaturtukhutsesi (Lord High Mandator) at Tamar’s court. Together with his brother Ivane, Shalva was in command of vanguard traditionally composed of the Meschian troops from south Georgia. In the battle of Shamkor against the Ildenizid atabeg of Azerbaijan in 1195, he captured a war banner sent by the Caliph to the Muslim army which was then donated to the revered icon of Our Lady of Khakhuli. In 1206/1207, Shalva, together with Sargis Tmogveli, took hold of the city of Kars from the Seljuqs and was appointed as the governor of the Kars county.

Example Output: b

Example Input: Question: What was the age difference between the 17th century Polish king and the person he helped regain Prussian in exchange for his support against Sweden? Passage:The Duchy of Prussia was a duchy in the eastern part of Prussia from 1525–1701. In 1525 during the Protestant Reformation, the Grand Master of the Teutonic Knights, Albert of Hohenzollern, secularized the Prussian State of the Teutonic Order, becoming Albert, Duke in Prussia. His duchy, which had its capital in Königsberg (Kaliningrad), was established as a fief of the Crown of Poland, as had been Teutonic Prussia since the Second Peace of Thorn in October 1466. This treaty had ended the War of the Cities or Thirteen Years' War and provided for the Order's cession of its rights over the western half of its territories to the Polish crown, which became the province of Royal Prussia, while the remaining part of the Order's land became a fief of the Kingdom of Poland (1385–1569). In the 17th century King John II Casimir of Poland submitted Frederick William to regain Prussian suzerainty in return for supporting Poland against Sweden. On July 29, 1657, they signed the Treaty of Wehlau in Wehlau (Polish: Welawa; now Znamensk), whereby Frederick William renounced a previous Swedish-Prussian alliance and John Casimir recognised Frederick William's full sovereignty over the Duchy of Prussia. Full sovereignty was a necessary prerequisite for upgrading the Duchy to Kingdom of Prussia in 1701.

Example Output: b

Example Input: Question: How old was Sir Edward Hughes when Cooke was promoted to Lieutenant? Passage:John Cooke was baptised on 5 March 1762 at St. Mary, Whitechapel, the second son of Francis Cooke, an Admiralty clerk, and his wife Margaret. John Cooke first went to sea at the age of eleven aboard the cutter under Lieutenant John Bazely, before going ashore to spend time at Mr Braken's naval academy at Greenwich. He was entered onto the books of one of the royal yachts by Sir Alexander Hood, who would become an enduring patron of Cooke's. In 1776 he obtained a position as a midshipman on the ship of the line , aged thirteen. Cooke served aboard Eagle, the flagship of the North American Station, during the next three years, seeing extensive action along the eastern seaboard. Notable among these actions were the naval operations around the Battle of Rhode Island in 1778, when Eagle was closely engaged with American units ashore. He distinguished himself in the assault, causing Admiral Lord Howe to remark "Why, young man, you wish to become a Lieutenant before you are of sufficient age." On 21 January 1779, Cooke was promoted to lieutenant and joined in the East Indies under Sir Edward Hughes, but was forced to take a leave of absence due to ill-health.

Example Output:
b