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: How many students did the United States Naval Academy have enrolled the year Smith graduated with his BS degree? Passage:Smith was born April 30, 1945, in Beaufort, North Carolina. He graduated from East Carteret High School in 1963, and went on to receive a Bachelor of Science degree in Naval Science from the United States Naval Academy in 1967. He subsequently attended the U.S. Naval Postgraduate School at Monterey, California, from which he graduated with a Master of Science degree in Aeronautical Engineering in 1968. He completed naval aviation jet training at Naval Air Station Kingsville, Texas, receiving his aviator wings in May 1969. He was then assigned to the Advanced Jet Training Command (VT-21) where he served as an instructor from May 1969 to March 1971. During the 2-year period that followed, he flew A-6 Intruders and completed a tour in 1972 during the Vietnam War while assigned to Attack Squadron 52 (VA-52) aboard the aircraft carrier . During his deployment with VA-52, Smith took part in Operation Linebacker, the first continuous bombing effort conducted against North Vietnam since 1968.

a

Question: Who managed the team that Brandon made his debut agains in the 2002-03
 season? Passage:Brandon signed a two-year contract with Division Two side Chesterfield, and made his debut against Queens Park Rangers on the first day of the 2002–03 season. Chesterfield lost the game at Loftus Road 3–1. Brandon's first goal for Chesterfield came a week later when he scored a 12-yard overhead kick to give them a late 2–1 victory over Port Vale. He scored again just ten days later as Chesterfield defeated Northampton Town 4–0. His third goal was another volley during a 1–0 victory over Stockport County. However, he was substituted at half-time, and he did not play for another two weeks because of suspension, until he scored again in a League Cup game against West Ham United live on television, which Chesterfield lost on penalties. He scored in both the first and second rounds of the Football League Trophy, but Chesterfield were defeated on penalties by Port Vale in the second round. He finished the season with ten goals but also 11 yellow cards. However, he played only one game during the final month, with his last game coming on 21 April 2003, when Chesterfield finished with just nine players because of serious injuries to Brandon and striker Caleb Folan. Chesterfield picked up four points in their final two games without Brandon, and avoided relegation by just one position, finishing two points above Cheltenham Town. Brandon's ten goals meant he finished as Chesterfield's top goalscorer and also helped Brandon win three awards at the club's end of season awards, as well as reported interest from nearby Nottingham Forest, who had missed out on promotion to the Premier League.


b