instruction:
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.
question:
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.

answer:
b


question:
Question: How many years did the war last that Eden's great-grandfather commanded the 2nd regiment of foot? Passage:Eden's great-grandfather was William Iremonger, who commanded the 2nd Regiment of Foot during the Peninsular War and fought under Wellington (as he became) at Vimeiro. He was also descended from Governor Sir Robert Eden, 1st Baronet, of Maryland and, through the Calvert Family of Maryland, he was connected to the ancient Roman Catholic aristocracy of the Arundell and Howard families, some of whom were Roman Catholics like the Dukes of Norfolk and others Anglican such as the earls of Carlisle, Effingham and Suffolk. The Calverts had converted to the Established Church early in the 18th century to regain the proprietorship of Maryland. He was also descendant from the Schaffalitzky de Muckadell family of Denmark, and Bie family of Norway. Eden was once amused to learn that one of his ancestors had, like Churchill's ancestor the Duke of Marlborough, been the lover of Barbara Castlemaine.

answer:
b


question:
Question: In what town was the AEAC's director born? Passage:The Adult Entertainment Association of Canada (abbreviated AEAC, also called the Adult Association of Canada) is a coalition of strip club owners and their agents that represents 53 of the 140 strip clubs in Ontario, Canada. Tim Lambrinos is the organization's director. The Exotic Dancers' Alliance (EDA), a collective that was founded in 1995 to bring together both former and current strippers and their supporters, sought to establish minimum employment standards for strippers in Ontario by contending with the AEAC, but the EDA ceased to exist in 2004. Also in 2004, Ottawa instituted a law against lap dancing, and the AEAC unsuccessfully attempted to have the law overturned in 2007. Starting in 2004, the AEAC and the Department of Citizenship and Immigration Canada became embroiled in a long-standing controversy about work permits for foreign workers to be hired for the purpose of striptease. In 2008, when Minister of Citizenship and Immigration Diane Finley allegedly received threats from sex industry officials in relation to her support of Bill C-17, which sought to allow immigration officers to deny temporary visas to prospective strippers if they were suspected to be sex trafficking victims, Lambrinos said that "it's not plausible" that any of the AEAC strip clubs were responsible for the threats. In 2009, the AEAC invited Toronto City Council members to attend a free lunch at a strip club in the city, and three councillors accepted the invitation. The AEAC released a statement in 2010 that the government's crackdown on sex industry worker visas had resulted in a stripper shortage, and Minister of Public Safety Vic Toews responded by saying that the strip clubs that were short on strippers because of the crackdown were engaging in human trafficking. Toews then ordered the Royal Canadian Mounted Police to investigate the relevant strip clubs in order to determine whether or not the strippers working there were illegal immigrants or sex trafficking victims, and the AEAC launched a campaign to deny these allegations.

answer:

a