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 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 Output:
b


Ex Input:
Question: How many games were won in the 2009 CECAFA Cup by the team that Eritrea beat 3-1? Passage:Eritrea returned to the 2009 CECAFA Cup in Nairobi. A young squad was assembled with just 12 days' training. In Group B, they gained a surprise draw with Zimbabwe, lost narrowly to Rwanda, and beat Somalia 3–1. They were easily beaten 4–0 in the quarter-finals by Tanzania. Twelve squad members failed to report for the return flight, and sought the assistance of the Refugee Consortium of Kenya. They were believed to be in hiding in Eastleigh, an eastern suburb of Nairobi home to many immigrants. Nicholas Musonye, the secretary-general of CECAFA, feared that the government might react by refusing to let the team travel abroad in future. The twelve players were later granted interim asylum by the United Nations High Commissioner for Refugees in Kenya. Eleven of these players have since travelled to Adelaide in Australia with two of them, Samuel Ghebrehiwet and Ambes Sium, signing for Gold Coast United in the A-League in August 2011.


Ex Output:
a


Ex Input:
Question: Who was the chief editor of the Sydney morning Herald in 1954? Passage:Elizabeth II was the first reigning monarch of Australia to set foot on Australian soil, coming ashore at Farm Cove, Sydney, on 3 February 1954. She had two years earlier been en route to Australia when her father died while she was on a private visit to Kenya, forcing her to return to the United Kingdom. Once finally in Australia, with her husband the Duke of Edinburgh, she undertook a journey through the Australian Capital Territory, New South Wales, Tasmania, Victoria, Queensland, South Australia and Western Australia, including greeting 70,000 ex-servicemen and women at the Melbourne Cricket Ground and opening the Australian Parliament in Canberra. In all, the Queen travelled 10,000 miles by air, making approximately 33 flights, 2000 miles by road (130 hours in cars in 207 trips), visiting all capitals except Darwin and 70 country towns, many by special "royal trains". On one such train trip they visited Leuralla, at Leura, in the Blue Mountains. Twenty-seven years earlier, Harry Andreas of Leuralla had acted as a fishing guide for The Queen's parents, whilst the young Princess "Lillibet" was left at home with her grandparents, King George V and Queen Mary. This extensive travel allowed some 75 per cent of the Australian population to see the Queen at least once during the tour. At the conclusion of the tour the Prime Minister, Robert Menzies, stated in an article published in the Sydney Morning Herald:


Ex Output:

a