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.

Input: Consider Input: Question: Why did the Nok culture die off about 200 AD on the Jos Plateau? Passage:The Nok culture thrived from approximately 1,500 BC to about 200 AD on the Jos Plateau in north and central Nigeria and produced life-sized terracotta figures that include human heads, human figures, and animals. Iron smelting furnaces at Taruga, a Nok site, date from around 600 BC. The Nok culture is thought to have begun smelting iron by 600-500 BC and possibly some centuries earlier. Kainji Dam excavations revealed iron-working by the 2nd century BC. Evidence of iron smelting has also been excavated at sites in the Nsukka region of southeast Nigeria in what is now Igboland: dating to 2,000 BC at the site of Lejja (Uzomaka 2009) and to 750 BC and at the site of Opi (Holl 2009). The transition from Neolithic times to the Iron Age apparently was achieved indigenously without intermediate bronze production. Others have suggested that the technology moved west from the Nile Valley, although the Iron Age in the Niger River valley and the forest region appears to predate the introduction of metallurgy in the upper savanna by more than 800 years. The earliest iron technology in West Africa has also been found to be contemporary with or predate that of the Nile valley and North Africa, and some archaeologists believe that iron metallurgy was likely developed independently in sub-Saharan West Africa.

Output: b

Input: Consider Input: Question: How much more money did Dangal gross when released compared to Bank Chor? Passage:Maxima is named after Russian novelist Maxim Gorky. She belongs to a Bengali-speaking Basu family residing in Delhi. She made her debut with Slumdog Millionaire (2009), in which she designed costumes and assisted Danny Boyle, who earned Academy Award for Best Director for the film. Later, she switched to designing costumes with 2013 blockbuster Goliyon Ki Raasleela Ram-Leela. Director Sanjay Leela Bhansali gave her the chance. He later repeated her for his next venture Bajirao Mastani. She was applauded nationally. Sanjay, Priyanka Chopra, Deepika Padukone and Ranveer Singh was all in praise for her dresses on their characters. She earned Filmfare Award for Best Costume Design in 2016 for the film. In 2017, she worked in two films : Bank Chor and Dangal, the latter being the highest grossing Indian film of all time. In 2017, popular designers Manoshi Nath and Rushi Sharma were scheduled to design dresses for Dangal, the highest grossing Indian film of all time. But co-producer Aamir Khan replaced them with her, giving the reason that they charged too much money for the film's budget. The film earned her second Filmfare Nomination.

Output: a

Input: Consider Input: Question: Which of the first three teams Williams played for is the oldest? Passage:Williams started his footballing career at his local club Cradley Town in 1990. After impressing in the lower leagues he attracted the attention of Football League sides and joined Welsh side Swansea City in 1991. After having a decent season with Swansea he move on up to Coventry City the following season. He spent three years with the sky blues making 80 league appearances, the most he would acquire in his career. Williams' early goal against Middlesbrough on 15 August 1992 was only the second goal ever scored in the newly formed FA Premiership (the goal came in the ninth minute of the game which was approximately four minutes after Brian Deane's goal against Manchester United on the opening day of the new season). Whilst at Coventry Williams had loan spells at Notts County, Stoke City and at his old club Swansea City. He left Coventry in 1995 and joined new league side Wycombe Wanderers to start a somewhat nomadic career. After two years with the chairboys he moved on to unsuccessful spells at Hereford United and Walsall. Williams then went on to have a new club every season starting with Exeter City in the 199798 season. He went on to play for Cardiff City, York City, Darlington, two seasons with Swansea City his third spell at the club and his final Football League side Kidderminster Harriers. Known as the "flying postman" due to his speed and career before football, when playing for Kidderminster scored famously against Wolves in the FA Cup 3rd round only for his goal to be equalised in the final minutes.
Output: b