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 many engines does the Boeing bomber that land at Taichung International Airport have? Passage:Taichung International Airport was constructed during the era of Japanese rule and was named . The United States Air Force (USAF) had been garrisoning the base with two fighter squadrons until the Sino-American Mutual Defense Treaty came into force on March 3, 1955. The airport then expanded in 1954 according to the Sino-American Mutual Defense Treaty, and later renamed Ching Chuan Kang Air Base (CCK) in memory of General Qiu Qingquan. In 1966 the American Air Force established a joint forces air-base at CCK. It was the largest air force base in the Far East at the time, allowing Boeing B-52 Stratofortress bombers to land. During the Vietnam War, CCK became a depot for the USAF. The US Military used CCK and Shuinan Airport to run many of its long-distance Vietnam, Cambodia and Laotian bombing, scouting and cargo transport runs during the Vietnam War era. This base was shut down and most American facilities were removed after U.S. established diplomatic relations with the China in 1979.


Ex Output:
b


Ex Input:
Question: Who governed Noricum after the Romans turned it into a province? Passage:Archaeological findings in the area date back to the Neolithic era, especially the stilt houses of the Mondsee group culture, who settled the region from about 3800 BC onwards. The Germanic name hall of several settlements refers to the region's numerous salt mines, which had been in use at least since the days of the Celtic Hallstatt culture, centered at the mining town of Hallstatt. These operations were continued by the Romans, after the area had been incorporated into the Noricum province in 15 BC. A Roman settlement and salt evaporation pond at Hallstatt is documented about 100, affected by several Germanic invasions after the Marcomannic Wars, until the province was finally evacuated at the behest of the Italian king Odoacer in 488.


Ex Output:
b


Ex Input:
Question: In what year was George Canning Prime Minister? Passage:Garvagh was the son of Paul Canning and the grandson of Stratford Canning of Garvagh in County Londonderry. Prime Minister George Canning and the diplomat Stratford Canning, 1st Viscount Stratford de Redcliffe, were his first cousins. He was elected to the House of Commons for Sligo Borough in 1806, a seat he held until 1812, and then represented Petersfield from 1812 to 1820. On 1 February 1810 he was elected a Fellow of the Royal Society and on 28 October 1818 he was raised to the Peerage of Ireland as Baron Garvagh, of Garvagh in the County of Londonderry. Lord Garvagh later served as Lord Lieutenant of County Londonderry between 1831 and 1840. He died while staying at a hotel in Châlons-sur-Marne (now renamed Châlons-en-Champagne) in August 1840, aged 61, and was succeeded in the barony by his son Charles Henry Spencer George Canning.


Ex Output:

b