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 soldiers did Britain send to World War I the year Roebuck arrived on the Western Front? Passage:As a boy, Roebuck worked as a trammer and after being sentenced to one month's imprisonment for stealing a watch in 1904, he enlisted in the York and Lancaster Regiment. Over the next seven years, he was stationed in India and Ireland and was promoted to lance corporal, but was demoted back to private in 1910 for "misconduct". He married in 1908 and had two children. Roebuck was discharged into the reserves in 1912 and likely returned to work as a miner prior to becoming a professional footballer in 1913. After Britain's entry into the First World War in August 1914, he was called up by the York and Lancaster Regiment and arrived on the Western Front in September 1914. On 18 October 1914, Roebuck recorded as "presumed dead" after an attack near Beaucamps-Ligny during the Race to the Sea. His death was confirmed by two comrades in January 1915. Roebuck is commemorated on the Ploegsteert Memorial to the Missing.


Output: a


Input: Consider Input: Question: Which team did Ferby lose to in the semi-finals of the 2001 Worlds? Passage:In 1999, Rycroft left the team to play with Ferbey's main rival, Kevin Martin. Rycroft was replaced by Marcel Rocque. The Ferbey Four that would dominate the Brier for the next few years was complete. Ferbey made his return to the Alberta provincials in 1999. While they didn't win, they did return in 2001 with a bang. They went on to winning not only the Alberta championship, but the 2001 Nokia Brier as well beating Kerry Burtnyk of Manitoba 8–4 in the final. This sent the team to the 2001 Worlds where they lost both their semi-final game and the bronze medal game, which they gave up to Pål Trulsen of Norway. In 2002, Ferbey won his fourth Brier, the 2002 Nokia Brier, which was his team's 2nd. They beat John Morris 9–4 in the final. This time, at the 2002 Worlds in Bismarck, North Dakota his team won the championship, beating the same Pål Trulsen, 10–5. Ferbey and his team would return to the Brier, at the 2003 Nokia Brier in Halifax, Nova Scotia. In the finals, they beat the home-town favourites Mark Dacey 8–4 in the finals. At the 2003 Ford World Curling Championship, his team won their 2nd world title, beating Ralph Stöckli of Switzerland 10–6 in the finals. The 2004 Nokia Brier was a blip on his team's record. After returning to the Brier for the fourth straight year, an unprecedented feat especially considering the great number of good teams in Alberta, his team would bow out in the final. After a 10–1 round-robin record, Ferbey and his team lost out to the same team they beat the previous year, Mark Dacey of Nova Scotia, in a 10–9 game where Ferbey's team surrendered a lead. However, Team Ferbey did not give up, and their reign would not be over. In 2005, the once again won the Alberta championships, and once again won the 2005 Canadian championships. This set a record, as his team became the first to win 4 championships as a team. The final was against Nova Scotia again, albeit a different team, that of Shawn Adams. In another close game, team Ferbey pulled it out and won 5–4 in the final. His trip to the 2005 Men's Ford World Curling Championships were marked with struggles, as the team finished the round-robin with three losses – tied for first with five other teams. After having a 4–3 record, Ferbey mounted eight straight wins to win the championship over David Murdoch of Scotland in a convincing 11–4 victory. Additionally, the Ferbey rink was the first team in history to score five on any single end in the world finals – and they managed this feat twice at the 2005 Ford World Curling Championships.


Output: a


Input: Consider Input: Question: Which other cities formerly ruled by Sun Quan belonged to the region conquered by emperor Cao Pi? Passage:In 221, warlord Sun Quan moved the capital of Eastern Wu from Gong'an county, Jingzhou (northwest of present-day Gong'an county, Hubei) to È county (in present-day Ezhou City), and renamed È to Wuchang (literally prospering from military, regarding its logistics role of the military bases established before the Battle of Red Cliffs). Later in the year Cao Pi proclaimed himself the emperor of Cao Wei. Sun Quan declared independence in the following year, and started to build forts and palaces in Wuchang. Sun Quan proclaimed himself the emperor of Eastern Wu in 229, and moved the capital to Jianye. Sun Hao, the emperor of Eastern Wu between 264 and 280, moved the capital back to Wuchang in 265. In 589, the Wuchang commandery was abolished and the Wuchang county was transferred to a new commandery named Ezhou (headquartered in present-day Wuchang District), and remained in the administration since then.



Output: b