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: What is the scientific name for studying why there are foreign materials in a bee's honey? Passage:Anemophilous pollen grains are light and non-sticky, so that they can be transported by air currents. They are typically in diameter, although the pollen grains of Pinus species can be much larger and much less dense. Anemophilous plants possess well-exposed stamens so that the pollens are exposed to wind currents and also have large and feathery stigma to easily trap airborne pollen grains. Pollen from anemophilous plants tends to be smaller and lighter than pollen from entomophilous ones, with very low nutritional value to insects. However, insects sometimes gather pollen from staminate anemophilous flowers at times when higher-protein pollens from entomophilous flowers are scarce. Anemophilous pollens may also be inadvertently captured by bees' electrostatic field. This may explain why, though bees are not observed to visit ragweed flowers, its pollen is often found in honey made during the ragweed floral bloom. Other flowers that are generally anemophilous are observed to be actively worked by bees, with solitary bees often visiting grass flowers, and the larger honeybees and bumblebees frequently gathering pollen from corn tassels and other grains.


Output: b


Input: Consider Input: Question: How much did the position director of football for Newcastle United pay in 2013? Passage:On 16 June 2013, in a series of telephone interviews Kinnear claimed he had been appointed as director of football for Newcastle United. In a Talksport interview over the telephone on 17 June 2013, Kinnear claimed to have replaced someone called "Derek Lambesi" (sic) as the club's director of football, signed Dean Holdsworth at Wimbledon for £50,000 (actually £650,000), sold Robbie Earle (retired a year after Kinnear left), signed goalkeeper Tim Krul when he was previously manager (actually signed by Graeme Souness three years prior) and has been awarded the LMA Manager of the Year award three times despite only winning the award once, he also said he'd never been sacked in his life. Kinnear claimed to have signed John Hartson on a free when he in fact paid £7.5 million for the striker. He also mispronounced the names of Yohan Cabaye, Hatem Ben Arfa, Shola Ameobi and others in the Talksport interview. The appointment, a three-year contract, was confirmed by Newcastle United on 18 June. The confusion around Kinnear's appointment to the role was criticised by former club chairman Freddy Shepherd in an interview with BBC Sport. Kinnear drew criticism when the 2013 summer transfer window closed with Kinnear failing to make a single permanent signing, lone recruit Loïc Rémy having been signed on loan from Queens Park Rangers. This criticism intensified at the end of the 2014 winter transfer window with Kinnear failing again to make a permanent signing, this after the £20 million sale of midfielder Yohan Cabaye, with Luuk de Jong having been brought in on loan from Borussia Mönchengladbach.



Output: a