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.

Example Input: Question: Did the USS Stribling visit Hawaii before making her way to Japan? Passage:On 30 January 1969, Stribling put to sea from Mayport, Florida, to make her second voyage to the Far East. Heading via the Panama Canal, San Diego, and Pearl Harbor, the destroyer made for Yokosuka, Japan, and then operations off the coast of Vietnam. Stribling participated in "Sea Dragon" and "Market Time" operations, and her duties also included bombardments on the gunline, search and rescue missions usually for downed carrier pilots, and Positive Identification Radar Advisory Zone (PIRAZ) duty. The latter assignment involved riding "shotgun" for larger PIRAZ ships armed with more sophisticated radar and target designation systems. That summer, Stribling plane-guarded for the carriers operating on "Yankee Station" in the Gulf of Tonkin. When not operating in the combat zone, she put into Kaohsiung, Taiwan; Hong Kong; and Subic Bay in the Philippines for repairs after a collision with a barge being towed by RVN tug during a nighttime underway replenishment . On 2 August 1969, Stribling cleared the combat zone to return home. On her way, she stopped at Kure and Yokosuka, Japan; Pearl Harbor; San Diego; Acapulco Mexico, and Panama. On 17 September 1969, she reentered Mayport.

Example Output: b

Example 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 31. They were easily beaten 40 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.

Example Output: a

Example Input: Question: Were all the 500cc motorcycles that Mackenzie raced on made by Japanese manufacturers? Passage:Mackenzie, who hails from Fankerton, near Denny, Stirlingshire; won the British Superbike Championship three times from 1996 to 1998 with the Rob McElnea-run Yamaha team, and the British 250cc and 350cc titles twice earlier in his career. He had a long career in the Grand Prix motorcycle racing circuit, debuting in 1984 in the 250cc class. He moved up to the 500cc class in 1986 on a Suzuki before spells on Honda and Yamaha motorcycles. He was 4th in the championship in 1990, and finished in the top 10 in the championship on five other occasions. His final racing season was the 2000 British Superbike series, although he did a farewell one-off at Knockhill in 2001 and stood in for the injured Yukio Kagayama at Donington Park in 2003.

Example Output:
b