In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.

Example 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.

Example Output: b

Example Input: Question: Who founded the club that has sent students to national level competitions? Passage:Lake Braddock is home to over 70 clubs. The DECA Club has sent students to national level competitions. In September 2006, Lake Braddock started a boys' volleyball team. The Lake Braddock Speech Team was reorganized in 2006 and began to compete in the VHSL. The Lake Braddock Key Club is one of the school's biggest and most prosperous clubs; having over 400 members, they raised $5,300 for UNICEF in October 2012. The Lake Braddock Model United Nations Club is an active participant in local and national conferences. LBSS has one of the few active high school chapters of Students for a Democratic Society. The It's Academic team has been featured on WRC-TV multiple times. Lake Braddock provides crew (rowing) as a club sport. Lake Braddock Crew has medaled in many regattas, including state competitions. Lake Braddock also features an Army JROTC program, started in 2010, which currently has over 150 cadets.

Example Output: b

Example Input: Question: Which of the organizations that are represented on YBF's advisory board has the highest membership numbers? Passage:As of September 2010, YBF's "advisory board" includes Matthew Elliott, founder of the UK TaxPayers' Alliance, and representatives of the Heritage Foundation (a US conservative thinktank), US Competitive Enterprise Institute and American Conservative Union (a US conservative lobbying organisation). It also includes the founder of the US Leadership Institute, the President of the US Jesse Helms Center, the President of the Young America's Foundation, the co-founder of the US Henry Jackson Society and a former Executive Director of the Collegiate Network. British representatives include Professor Patrick Minford, blogger Iain Dale (who resigned in the same year) and two local councillors. Liam Fox, the shadow defence secretary, was a member of the YBF's parliamentary council. Conor Burns was until shortly before becoming an MP in 2010 the vice-president of YBF.

Example Output:
a