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.

[EX Q]: 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.

[EX A]: a

[EX Q]: Question: How many viruses are recognized as the type of virus that poliovirus is? Passage:Poliovirus is an enterovirus. Infection occurs via the fecal–oral route, meaning that one ingests the virus and viral replication occurs in the alimentary tract. Virus is shed in the feces of infected individuals. In 95% of cases only a primary, transient presence of viremia (virus in the bloodstream) occurs, and the poliovirus infection is asymptomatic. In about 5% of cases, the virus spreads and replicates in other sites such as brown fat, reticuloendothelial tissue, and muscle. The sustained viral replication causes secondary viremia and leads to the development of minor symptoms such as fever, headache, and sore throat. Paralytic poliomyelitis occurs in less than 1% of poliovirus infections. Paralytic disease occurs when the virus enters the central nervous system (CNS) and replicates in motor neurons within the spinal cord, brain stem, or motor cortex, resulting in the selective destruction of motor neurons leading to temporary or permanent paralysis. In rare cases, paralytic poliomyelitis leads to respiratory arrest and death. In cases of paralytic disease, muscle pain and spasms are frequently observed prior to onset of weakness and paralysis. Paralysis typically persists from days to weeks prior to recovery.

[EX A]: b

[EX Q]: Question: Which teams besides the Michigan Wolverines did head coach Brian Ellerbe coach before the 1997-1998 season? Passage:The 1997–98 Michigan Wolverines men's basketball team represented the University of Michigan in intercollegiate college basketball during the 1997–98 season. The team played its home games in the Crisler Arena in Ann Arbor, Michigan, and was a member of the Big Ten Conference. Under the direction of head coach Brian Ellerbe, the team finished fourth in the Big Ten Conference. The team emerged victorious in the inaugural 1998 Big Ten Conference Men's Basketball Tournament. The team earned an invitation to the 1998 NCAA Men's Division I Basketball Tournament as a number three seed where it was eliminated in the second round. The team was ranked for twelve of the eighteen weeks of Associated Press Top Twenty-Five Poll, starting the season unranked, peaking at number twelve where it ended the season, and it also ended the season ranked twelve in the final USA Today/CNN Poll. The team had a 4–3 December 13, 1997, against #1 Duke 81–73 at home, December 26, 1997, against #19 Syracuse 93–61 at the Puerto Rico Holiday Classic, Eugene Guerra Sports Complex in San Juan, Puerto Rico, February 1 against #16 Iowa 80–66 on the road, March 8 against #9 76–67 at the 1998 Big Ten Conference Men's Basketball Tournament at the United Center. The victory over Duke was one of only two victories over the number one ranked team in the country in the history of the school.

[EX A]:
b