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: Which stadium Cross played in holds more fans, Vale Park or Belle Vue? Passage:Cross began his career at Walsall, who finished 12th in the Third Division in 196667 under the stewardship of Ray Shaw. New boss Ron Lewin then took the "Saddlers" to a seventh-place finish in 196768. After a 13th-place finish in 196869, Bill Moore returned to lead Walsall to 12th place in 196970. Cross played just 12 league games in his four years at Fellows Park. He joined Gordon Lee's Port Vale in July 1970. He made his debut on 5 September, in a 10 win over Preston North End at Vale Park. He played 42 Third Division games in the 197071 season, and scored his first goal in the Football League on 2 January, in a 21 win over Doncaster Rovers at Belle Vue. He was an ever-present in the 197172 season, playing all 46 league and five cup games. He made 40 appearances in the 197273 season, and ended a series of 134 consecutive appearances from his debut in March 1973 when he wrenched his left knee. He recovered from this injury to play just two games in the 197374 campaign, but then he injured his knee ligaments in October 1973 and was out of action for 17 months. He managed to play just two games in the 197475 season, and was handed a free transfer in May 1975 by new manager Roy Sproson. He went on to play for Southern League side Nuneaton Borough. Upon his retirement as a player, he became a School of Excellence coach at Stoke City. He later went on to become a teacher for 25 years.

Example Output: b

Example Input: Question: What is the Black Watch? Passage:Thomson was born in Glasgow; soon after he was born his family realised that Glasgow was full of John Thomsons and started calling him Ian. He was educated at the High School of Glasgow and the University of Glasgow. In 1939 he joined the Black Watch but was able to finish his studies at Glagow University, graduating with a degree in economics in 1940. He had already applied to join the Colonial Service, did so in 1941 and was sent to Fiji, then a British colony, as aide-de-camp to the Governor, Sir Harry Luke. He was commissioned in the Fiji Military Forces and saw action in the Solomon Islands campaign. He was appointed a military "in recognition of gallant and distinguished services in the South West Pacific" in 1945. After the war he served the Administration of Fiji, becoming a District Officer and eventually District Commissioner 196366. In 1967 he reluctantly left Fiji to become Governor of the British Virgin Islands (BVI). He was appointed in the 1968 Birthday Honours. In 1971 he returned to Fiji after being invited by the Prime Minister of the newly independent Dominion of Fiji, Ratu Sir Kamisese Mara, to chair the board of the Fiji Sugar Corporation. He was also chairman of Fiji's airline, Air Pacific. He was knighted KBE in the 1985 New Year Honours on the advice of the Fijian government.

Example Output: b

Example Input: Question: How long did the period of China when Ji was an official last? Passage:Jiang Ji (died 18 May 249), courtesy name Zitong, was an official and military general of the state of Cao Wei during the Three Kingdoms period of China. Born in the late Eastern Han dynasty, Jiang Ji started his career as a low-level official in his native Yang Province before becoming a subordinate of Cao Cao, the warlord who controlled the central government towards the end of the Eastern Han dynasty. After the end of the Eastern Han dynasty, he served in the state of Cao Wei through the reigns of the first three emperors Cao Pi, Cao Rui and Cao Fang and held various appointments in the military before rising to Grand Commandant, one of the top positions in the central government. During his service in Wei, he was known for being candid in giving advice to the emperor on various issues, including consolidating power, halting labour-intensive construction projects, and officials' abuses of power. In February 249, he joined the regent Sima Yi in staging a successful coup d'etat against his co-regent Cao Shuang, but died from illness a few months later.

Example Output:
b