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.

Input: Consider 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.

Output: b

Input: Consider Input: Question: What city that was chosen for filming Aeon Flux has the largest population? Passage:The screenplay was written by Phil Hay and Matt Manfredi, and directed by Karyn Kusama. It was based on the animated TV series by Peter Chung, who had a minor role in this film version of his work. In the early stages of production, actress Michelle Rodriguez was considered for the part of on. She had previously worked with Kusama in Girlfight. Kusama had originally suggested filming in Brasilia, the capital of Brazil, because the 20th-century modern architecture of that city fit with her vision of Bregna. The producers rejected the idea because Brasilia lacked the infrastructure and technical expertise to support a major film production. After several cities were scouted, Berlin and Potsdam in Germany were chosen for filming. Berlin had several locations that fit into the organic yet structured world of on Flux. The crew gained permission to film in several locations that had never allowed such access before, including the Treptow Crematorium, the Adlershof Trudelturm and Windkanal wind tunnel facility, and the Haus der Kulturen der Welt ("House of the World's Cultures"). Additional locations included the Bauhaus Archive and a dissection theatre built in 1790 to train veterinarians, part of the Berlin animal shelter. It was used as the Handler space. Filming was temporarily suspended for a month during September 2004 while Theron recovered from a neck injury she sustained during stunt-work on the tenth day of shooting. She was hospitalized in Berlin for five days and required about six weeks of physiotherapy to recover.

Output: b

Input: Consider Input: Question: What three singles did The White Stripes release before their first album? Passage:After three singles, The White Stripes released their self-titled debut album in June 1999. Their second studio album, the well-received De Stijl, followed in June 2000. The band's third studio album, White Blood Cells, became their breakthrough album, receiving much acclaim while pushing the band to the forefront of alternative rock. They later signed to V2 Records and released their fourth studio album Elephant in April 2003. The album was a commercial success, peaking at number six on the US Billboard 200 and reaching the top ten in multiple other countries. Elephant has been certified platinum by the Recording Industry Association of America (RIAA). The album spawned the single "Seven Nation Army", which topped the US Billboard Alternative Songs chart and became the group's first appearance on the US Billboard Hot 100, where it peaked at number 76.
Output: a