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 Input:
Question: Was Leon Friend still active as a teacher the year Gorelick graduated from Brooklyn College? Passage:Born Shirley Fishman in Brooklyn, New York, she attended Abraham Lincoln High School. Her teacher, Leon Friend, arranged for guest lectures by commercial and fine artists. Shirley Fishman had the opportunity to study with three of them: Chaim Gross, Moses Soyer, and Raphael Soyer. Gross influenced her early sculptural work, which features squat figures with thick limbs. While attending Brooklyn College, where she earned her B.A. in 1944, she met Leonard Gorelick (19222011), a fellow student. They married in 1944 and shared an enthusiasm for art and culture. Leonard Gorelick was an orthodontist and later a collector of cylinder seals. He combined his interests by investigating the authenticity of cylinder seals through the use of dental technology, especially electronmicroscopy. Shirley Gorelick earned an M.A. at Teachers College, Columbia University in 1947. That year, she studied for several weeks with Hans Hofmann in Provincetown. For a short time in the late 1950s, she was a student of the painter Betty Holliday and, in the early 1960s, learned printmaking in the Long Island studio of Ruth Leaf.

Ex Output:
a

Ex Input:
Question: How many viruses are recognized as the type of virus that poliovirus is? Passage:Poliovirus is an enterovirus. Infection occurs via the fecaloral 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 Output:
b

Ex Input:
Question: In what city was Anthony Alexander Forrest's father born? Passage:Forrest was born in Perth as one of five children born to Amy Eliza (nee Barrett-Lennard) and Alexander Forrest. On his mother's side, he was a descendant of the Barrett-Lennard baronets and the Barons Dacre. His father was an explorer and surveyor who later served as Mayor of Perth, and represented the seat of West Kimberley in the Western Australian Legislative Assembly. His uncles, David and John Forrest, were also politicians, with the latter serving as the first Premier of Western Australia. Growing up, Forrest attended The High School (later Hale School) on St Georges Terrace in the centre of Perth. At school, he was a noted sportsman, and later served as a prefect of the school. Forrest was the bowman for the crew that won the first Head of the River race in 1899 and kept wicket for the school's cricket team. He also played a number of games for the school's football team, and captained the side to victories against Christian Brothers' College and Scotch College.

Ex Output:
b