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 tall is Mount Weeks? Passage:According to the United States Census Bureau, the city has a total area of , of which is land and is water, comprising 1.35% of the city. Berlin is situated at the confluence of the Androscoggin and Dead rivers. The Mahoosuc Range is to the southeast. Jericho Mountain State Park, created from a city park and from private land in 2005, is west of the city center and features a reservoir created in the 1970s and a network of ATV trails. The city's highest point is Mount Weeks, at above sea level. A prominent feature in the landscape of Berlin is Mount Forist, rising over the west side of the city. Approximately half of Berlin lies within the Connecticut River watershed, and half lies in the Androscoggin River watershed.

Example Output: a

Example Input: Question: How long did Weichardt's group stay in existence? Passage:Nazism found an audience in the country, with pro-Nazi elements organised by Louis Weichardt in 1932 under the name South African Gentile National Socialist Movement, a group that soon became known as the Greyshirts. Although the group enjoyed some support and continued after the Second World War they never became sufficiently important for the government to take action against them. The other main fascist group was the Ossewabrandwag (OB), founded in 1939, a group also inspired by Adolf Hitler. The two differed however as the Greyshirts emphasised Aryan race rhetoric and so organised amongst the various white immigrant communities whilst the OB were specifically for Afrikaner only. A third, more minor group, the New Order, emerged in 1940 under the leadership of former cabinet minister Oswald Pirow. After the Second World War Pirow became an important figure in neo-fascism, working closely with Oswald Mosley, Nation Europa and A. F. X. Baron. Nazi Germany sought to encourage such activity with former Olympic boxer Robey Leibbrandt active as an agent for the Abwehr during the war. The Nazi Party itself also organised until it was outlawed in 1936.

Example Output: b

Example Input: Question: Did the son of the overthrown king have any siblings? Passage:Maurice had to continue the war against the Persians. In 586 his troops defeated them at the Battle of Solachon south of Dara. In 588, a mutiny by unpaid Byzantine troops against their new commander, Priscus, seemed to offer the Sassanids a chance for a breakthrough, but the mutineers themselves repulsed the ensuing Persian offensive. Later in the year they secured a major victory before Martyropolis. The Sassanid commander, Maruzas, was killed, several of the Persian leaders were captured along with 3,000 other prisoners, and only a thousand men survived to reach refuge at Nisibis. The Byzantines secured much booty, including the Persian battle standards, and sent them, along with Maruzas' head, to Maurice in Constantinople. In 590 two Parthian brothers, Vistahm and Vinduyih, overthrew King Hormizd IV and made the latter's son, Prince Khosrau II, the new King. The former Persian commander-in-chief, Bahram Chobin, who had rebelled against Hormizd IV, claimed the throne for himself and defeated Khosrau. Khosrau and the two Parthians fled to the Byzantine court. Although the Senate unanimously advised against it, Maurice helped Khosrau regain his throne with an army of 35,000 men. In 591 the combined Byzantine-Persian army under generals John Mystacon and Narses defeated Bahram Chobin's forces near Ganzak at the Battle of Blarathon. The victory was decisive; Maurice finally brought the war to a successful conclusion with the re-accession of Khosrau.

Example Output:
a