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: 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.

Example Output: a

Example Input: Question: Which team won more games the year Cowan started with the Rams, the Vikings or the Cowboys? Passage:Charles Edward Cowan (June 19, 1938 in Braeholm, West Virginia April 29, 1998 in Los Angeles, California) was an American football offensive tackle who played fifteen seasons in the National Football League with the Los Angeles Rams from 1961 to 1975. Cowan was a huge intimidating presence on the left of Tom Mack, a member of the Pro Football Hall of Fame, from 1966 to 1975, forming a potent left side of the offensive line, with help from Ken Iman at center from 1965 to 1975. In that 1961 to 1975 span, the Rams made the playoffs 5 times (1967,1969,1973,1974,1975), reaching the NFC championship game of the 1974-75 NFL playoffs and the 1975-76 NFL playoffs, but losing to the Minnesota Vikings and to the Dallas Cowboys, respectively. In the 1974 divisional round, the Rams defeated the Washington Redskins, as Cowan was successful against the opposing the right defensive end Verlon Biggs. In the 1975 divisional round, Doug France started in his place as the Rams defeated the St. Louis Cardinals. Cowan came back to play against the Cowboys, his final game, as the Rams could not get past them. Cowan was replaced by Doug France in 1976.

Example Output: a

Example Input: Question: Which mountains the Dyke climbed were the highest? Passage:In his spare time during his working life, he climbed the Cape Peninsula mountains, the Hottentots-Holland mountains, and nearby ranges, all of which are spectacular examples of Fynbos, including Peninsula Granite Fynbos, Peninsula Sandstone Fynbos and a number of related biomes. Later, when the railway administration moved to Johannesburg, he continued his explorations in various parts of the Drakensberg mountains, as well as on visits to Lesotho. On such excursions he collected avidly and sent specimens to Dr Rudolf Marloth. He extended his explorations to other regions as well; for example, while climbing the Cockscomb Mountains in the Winterberg range near Uitenhage he discovered a hitherto unrecognised species of Protea, later named Protea dykei Phill (now seen as a synonym of Protea rupicola). On Matroosberg in the Hex River Mountains, he discovered a new species of "everlasting", flowers that in those days were generally included in the genus Helichrysum. That species was described by Harry Bolus under the name Helichrysum dykei Bolus. The genus has since been split however, and the species has been assigned to another genus, as Syncarpha dykei (Bolus) B. Nord. Dyke's name also appears in the names of Erica dykei L. Bolus (= Erica thodei Gilg) and Lessertia dykei L. Bolus.

Example Output:
a