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: 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.

b

Question: Of the first two post-doc positions John Ellis held, which company did he work for the longest? Passage:After completing his secondary education at Highgate School, he attended King's College, Cambridge, earning his PhD in theoretical (high-energy) particle physics in 1971. After brief post-doc positions at SLAC and Caltech, he went to CERN and has held an indefinite contract there since 1978. He was awarded the Maxwell Medal and the Paul Dirac Prize by the Institute of Physics in 1982 and 2005 respectively, and is an Elected Fellow of the Royal Society of London since 1985 and of the Institute of Physics since 1991. He was awarded an Honorary Doctorate from the University of Southampton, and twice won the First Award in the Gravity Research Foundation essay competition (in 1999 and 2005). He is also Honorary Doctor at Uppsala University.

a

Question: Which famous English actress who played the title role died first? Passage:Zaire was soon translated into English by Aaron Hill as Zara: A Tragedy. Following its successful run at London's Drury Lane Theatre in 1736, Zara became the most frequently staged English adaptation of a Voltaire play. Famous English actresses who have played the title role include Susannah Maria Cibber, who made her stage debut in the 1736 Drury Lane production, Sarah Siddons, and Elizabeth Younge. The first known professional performance of the play in the American Colonies was in Philadelphia on 26 December 1768, performed by the Hallam Company using the Aaron Hill version. The company took the play to New York City in 1769 and after the end of the Revolutionary War sporadically revived it there and in Philadelphia. The first professional performances after the hostilities ended were given in Baltimore in April 1782 by the Thomas Wall Company. Although the professional theatres were closed during the War, the play proved popular with the British Army. General Burgoyne, himself a playwright, produced Zara with military actors in British-occupied Boston in 1775 and four times in occupied New York between 1780 and 1781.
b