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: Where do the Premier League team that signed Rodriguez to a four-year contract play their home games? Passage:On 28 August 2015, Rodríguez signed a four-year contract with Everton of the Premier League for a reported fee of £500,000. Manager Roberto Martínez said that he would likely be put into the first team due to his experience in top-flight football in his homeland. However, Rodríguez made his debut for the under-21 team on 7 September. In his debut, he would head in Ryan Ledson's cross to open a 3–0 home win over Preston North End in the Lancashire Senior Cup. Fifteen days later, he was included in the senior squad for the first time, but remained on the bench as an unused substitute in a 2–1 win away to Reading in the second round of the League Cup. Rodríguez made his Everton first team debut on 9 January 2016 in the third round of the FA Cup when he replaced Aaron Lennon for the final minute of a 2–0 win over Dagenham & Redbridge at Goodison Park.

Example Output: b

Example Input: Question: Is Vitebsk the capital of a country? Passage:A.P. Rosengolts was born in Vitebsk on November 4, 1889. He was the son of a Jewish merchant. He joined the Bolshevik faction of the Russian Social-Democratic Workers' Party (RSDRP) in 1905, the year of the first, abortive Russian Revolution. He worked as an insurance agent and carried out work for the Bolshevik party in Vitebsk, Kiev, Ekaterinoslav and Moscow. Rosengolts played an active role in the Revolution of 1917. He was a member of the Executive Committee of the Moscow City Council, the Moscow Military-Revolutionary Committee and the All-Russian Military-Revolutionary Committee. He was a leading officer in the Red Army and, during the Russian Civil War, worked closely with L.D. Trotsky. After the Civil War, Rosengolts worked successively for the Commissariats of Transportation and Finance and the Directorate of the Red Army Air Force. He served as ambassador to Britain from 1925 to 1927 and oversaw Soviet espionage in Britain. He became a member of the Central Committee of the Communist Party of the Soviet Union in 1927 and held various high positions in the Communist Party and the Soviet government. In 1930 he was appointed People's Commissar of Foreign Trade. On June 14, 1937, Rosengolts was dismissed from this office and on October 7, 1937, he was arrested. He was one of the defendants of the third Moscow Trial, along with Nikolai Bukharin, Alexey Rykov and other prominent Soviet officials. The accused faced a long list of capital charges, including plotting to assassinate Lenin and Stalin, espionage and sabotage. Like most of his co-defendants, Rosengolts confessed. He was convicted, sentenced to death and shot on March 15, 1938 in Moscow. He was rehabilitated in 1988.

Example Output: b

Example Input: Question: What does CBS stand ford? Passage:In September 1998, alongside the launch of The WB 100+ Station Group (The WB 100+), WLAJ began operating a cable-only affiliate of The WB which was part of the national service. This was available exclusively on Comcast channel 30, had its own logo, and used the "WBL" call sign in a fictional manner. From 2002 until 2006, the internal operations (such as advertising sales) of UPN affiliate WHTV were housed at WLAJ's studios. That station then relocated to the WLNS facility after entering into a joint sales agreement with WLNS' then-owner Young Broadcasting. On January 24, 2006, The WB and UPN announced the networks would merge. The new combined network would be called The CW. The letters represented the first initial of its corporate parents: CBS (the parent company of UPN) and the Warner Bros. unit of Time Warner.

Example Output:
a