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: In what year did Ostashenko's country join the first world war? Passage:Ostashenko was born on 19 June 1896 in the village of Bolshaya Lyubshchina, Yanovichskoy volost, Vitebsky Uyezd, Vitebsk Governorate to a peasant family. He graduated from four grades at a gymnasium. During World War I, he was mobilized for military service on 7 August 1915, being sent to the 4th Company of the Reserve Battalion of the Petrograd Lifeguard Regiment in Petrograd. With the battalion, he fought with the Southwestern Front between July 1916 and February 1917, then returned to Petrograd before being demobilized on 13 March 1918. In July, he volunteered for the Red Army, serving in the Vitebsky Uyezd military commissariat as a clerk and instructor organizer. From May 1919 Ostashenko served as a Red Army man and political soldier – a Communist mobilized to conduct political work in the army – in the march battalion of the Vitebsk Reserve Regiment. From July he served as an assistant platoon commander in the 84th Rifle Regiment of the 10th Rifle Division, which fought against the Northwestern Army near Petrograd as part of the 15th Army of the Western Front. He entered the Smolensk Commanders' Infantry Courses in November and upon graduation in June 1920 became a platoon commander in the Rzhev-based 2nd Reserve Regiment. This assignment proved to be brief and a month later, Ostashenko became adjutant of the 4th Landing Detachment for armored trains with the Western Front. He fought with the detachment, which provided landing parties for armored trains, in the Polish–Soviet War and was wounded twice.


Output: a


Input: Consider Input: Question: Which team won the game on October 16, 2010? Passage:Murray started the 2010 season off with a strong performance of 208 rushing yards and two rushing touchdowns against Utah State. In the next game against Florida State, he had 51 rushing yards and two rushing touchdowns. In the following game against Air Force, he recorded 110 rushing yards and his third consecutive game with two rushing touchdowns. In addition, he had five receptions for 38 yards and a receiving touchdown. After posting 67 rushing yards and a touchdown against Cincinnati in the following game, he had 115 rushing yards and two rushing touchdowns against Texas. On October 16, 2010, with 112 rushing yards and two rushing touchdowns against Iowa State, Murray passed running back Steve Owens as the all-time touchdown leader at the University of Oklahoma with 58 touchdowns. On November 20, against Baylor, he had 62 rushing yards, one rushing touchdown, six receptions, 120 receiving yards, and one receiving touchdown. In his final collegiate game, he had 93 rushing yards and one rushing touchdown against Connecticut in the 2011 Fiesta Bowl. He finished his last season with the Sooners with 1,214 rushing yards, 15 rushing touchdowns, 71 receptions, 594 receiving yards, and five receiving touchdowns. He ended his college career with 65 touchdowns, becoming only the fifth player in Big 12 conference history to score at least 60 career touchdowns.


Output: a


Input: Consider Input: Question: In what issues of Batman did the villain Black Mask originally show up? Passage:Within the regular series, the buildup to "Knightfall" begins with a six-issue run in Batman #484-489 (September 1992 - February 1993), in which Batman (at the onset of a personal psychological mid-life crisis) is forced to deal, in rapid succession, with the returning villain Black Mask and his gang (who target Bruce Wayne and Lucius Fox), a crazed killer called Metalhead, and a sharpshooter assassin hired by an imprisoned mobster to murder Commissioner Gordon. Batman begins to feel that he has lost his edge, especially after his failure to capture Black Mask. He finds himself unable to meditate or even focus. As Bruce Wayne, he contacts holistic therapist Shondra Kinsolving for treatment. He also assigns Robin (Tim Drake) to train Jean-Paul Valley in detective work to aid them as an ally, hoping to guide Valley's brainwashing away from making him a villainous threat. Despite the advice of everyone in his life, including Dr. Kinsolving, Bruce refuses to rest and continues to pursue his self-imposed duty despite his worsening condition (although not explicitly noted as a cause, these events take place immediately after the death of Superman, Batman's peer, elsewhere in the DC Universe).



Output: b