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: Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin? Passage: The group was occasionally diverted from strategic missions to carry out air support and interdiction missions. It supported Operation Overlord, the invasion of Normandy by attacking transportation targets, including bridges, along with airfields and strong points in France. On D Day, the squadron and the rest of the 446th Group led the first heavy bomber mission of the day. The 446th aided ground forces at Caen and Saint-Lo during July by hitting bridges, gun batteries, and enemy troops. During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. It struck lines of communications during the Battle of the Bulge. During Operation Varsity in March 1945, it supplied ground and airborne troops near Wesel. The squadron flew its last combat mission on 25 April 1945 against Salzburg, Austria. The group had flown 273 missions and had lost 58 aircraft during the war,
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Example solution: a
Example explanation: The passage describes the 704th's actions during Operation Market Garden so only information about the operation is needed.

Problem: Question: How long did the Eurasian empire that rose in the thirteenth century last? Passage:Vajrayana had also become the major religion of Tibet and the Western Xia by the time of the rise of the Mongol Empire in the thirteenth century. As the Tibetan and Tangut peoples came under the rule of Mongol leaders during the reign of Mongke Khan (12091259), they increased their missionary activity in Mongolian lands, eventually converting the leadership and much of the population as well aiding in the translation of Buddhist texts into Mongolian. So it is no surprise that after the Mongol conquest of China and their establishment of the Yuan dynasty (12711368), the Yuan emperors made Tibetan Buddhism the official religion of China, and Tibetan monks (or, as they were called in Chinese, "barbarian monks from the West", ) were given patronage at the court. Lamas of the Sakya school like Sakya Pandita and also of the Kagyu became imperial preceptors of the Mongol Khans. The tantric deity Mahakala was used in military campaign to protect the armies during their war against China and became the protector deity of the Yuan state. They were granted unprecedented status and privileges such as temple offerings and shrines.
Solution: b