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 Q]: Question: How long had Ferdinand I been in power the year Coimbra fell? Passage:The history of the county of Portugal is traditionally dated from the reconquest of Portus Cale (Porto) by Vímara Peres in 868. He was named a count and given control of the frontier region between the Limia and Douro rivers by Alfonso III of Asturias. South of the Douro, another border county would be formed decades later when what would become the County of Coimbra was conquered from the Moors by Hermenegildo Guterres. This moved the frontier away from the southern bounds of the county of Portugal, but it was still subject to repeated campaigns from the Caliphate of Córdoba. The recapture of Coimbra by Almanzor in 987 again placed the County of Portugal on the southern frontier of the Leonese state for most of the rest of the first county's existence. The regions to its south were only again conquered in the reign of Ferdinand I of León and Castile, with Lamego falling in 1057, Viseu in 1058 and finally Coimbra in 1064.

[EX A]: b

[EX Q]: Question: How old was the person who chaired the AUKcon convention held in February 1994 in London? Passage:AUKcon was a one-day anime convention held in London, England, on 19 February 1994. The venue was the Conway Hall (Red Lion Square), and the registration charge was £10. AUKCon was chaired by Helen McCarthy. During the convention, Lawrence Guinness of Manga Video announced that the company had acquired distribution rights for Ranma 1/2 and planned to start releasing it in 1994. Also announced included plans for the series Bio Booster Armor Guyver. One of the guests that attended was Toren Smith, writer of the American Dirty Pair comic and founder of Studio Proteus. The convention was the first UK anime event to provide a fan room with free space for fanzines and fanclubs. It also ran a gaming programme and an art and model show, as well as anime screenings and talks. 

[EX A]: b

[EX Q]: Question: What years were World War II fought? Passage:There is a great deal written in music history books about the period of artistic experimentalism after World War II in Europe and the United States. Much like the period in France after the Franco-Prussian War (Impressionism) and in the late 19th century, the pre/post World War I period of (Expressionism), the post World War I period of Modernism was no different with composers trying to 'write music for the sake of music' and not attaching it to a social meaning or meant for a social cause (see Darmstadt School). The LP City of Glass and the whole body of work from the Stan Kenton orchestra and Robert Graettinger (1947–1953) is a direct product of the experimental American music scene of the post World War II era. Though overshadowed historically by other compositional endeavours in jazz at the time attributed to George Russell, Neal Hefti or Lennie Tristano, Graettinger and City of Glass is important in the progress that was to be part of Third stream jazz.

[EX A]:
b