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: Has the maple leaf been used on any other coat of arms or country flags besides in Canada? Passage:The maple leaf has been used as a Canadian emblem since the 18th century. It was first used as a national symbol in 1868 when it appeared on the coat of arms of both Ontario and Quebec. In 1867, Alexander Muir composed the patriotic song "The Maple Leaf Forever", which became an unofficial anthem in English-speaking Canada. The maple leaf was later added to the Canadian coat of arms in 1921. From 1876 until 1901, the leaf appeared on all Canadian coins and remained on the penny after 1901. The use of the maple leaf by the Royal Canadian Regiment as a regimental symbol extended back to 1860. During the First World War and Second World War, badges of the Canadian Forces were often based on a maple leaf design. The maple leaf would eventually adorn the tombstones of Canadian military graves.

Example Output: b

Example Input: Question: What materials are used as fuel in the type of furnace first used in the Weald to produce cast iron? Passage:Sir Francis Pettit Smith of Kent invented the screw propeller. Faversham Oyster Fishery is the oldest company in the world. Maidenhead Railway Bridge is known for its flat arch, built in 1839 with 39-metre spans. The Wealden iron industry in the Weald was the site of the first blast furnace in Britain in 1491, and produced much of Britain's cast iron until the 1770s. Portsmouth Block Mills were the site of the world's first metal machine tools, built for the manufacture of wooden pulleys, invented by Henry Maudslay, and the site of the world's first industrial assembly line in 1803. South Foreland Lighthouse on 8 December 1858 was the world's first lighthouse with electric light, with the first type of industrial electrical generator made by Frederick Hale Holmes, from work he had carried out with Floris Nollet of Belgium, and 36 permanent magnets. By 1880, of the ten lighthouses with electric light, five were in the UK. From the lighthouse in 1899, the first international radio broadcast to France was made. Zénobe Gramme of Belgium made a much better design in 1870 with self-excitation of magnets, and the first modern dynamo. North Foreland Lighthouse was the UK's last-manned lighthouse until 1998.

Example Output: b

Example Input: Question: What position did Paul Izzo play? Passage:Pearce's first experience of senior football came in the Northern NSW State League Division 1, for Newcastle Jets youth, where coach (and former Australian international) Clayton Zane praised Pearce's potential and passing ability. For the 2014 National Premier Leagues season, Pearce moved to Broadmeadow Magic. In October 2014, it was announced that Pearce had joined Central Coast Mariners' youth squad to play in the 2014–15 National Youth League. He was called up to the senior squad for the first time and was an unused substitute against Sydney FC in an A-League match in November 2014 following an injury to Liam Reddy. Reddy's departure in late 2015 and suspension and international selection for Paul Izzo led Pearce and fellow young 'keeper Tom Heward-Belle to be called up to the senior side. He made his A-League debut for the Mariners in a loss to Western Sydney Wanderers in April 2016. Pearce was in A-League action again a week later, coming on as an early substitute after Paul Izzo suffered a concussion in the opening minute of an eventual loss to Newcastle Jets. On 6 April 2017, he signed a one-year professional contract with Central Coast Mariners.

Example Output:
b