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 world championships have been won by the team that the Reds outscored 22-8? Passage:On the mound, the Reds relied on left-handers Don Gullett and Fred Norman to pacify the Yankee hitters in Games 1 and 2, respectively. Gullett had come back from a mid-season injury to start Game 1 but had to leave the game in the eighth inning due to a twisted ankle while Norman out-pitched ace Hunter in Game 2. Game 3 in New York pitted effective 1976 NL Rookie of the Year Pat Zachry for the Reds against newly acquired Yankee, Dock Ellis. Ellis only lasted innings, exiting in the fourth after a home run by Driessen. Game 4 was delayed a day due to rain, but the Reds were ready for the sweep. Bench's two-run home run gave the Reds a 3–1 lead. In the bottom of the eighth, a frustrated Billy Martin threw a baseball from the dugout onto the field towards home plate umpire Bill Deegan, causing his ejection from the game. In the ninth, Bench's second home run followed by back-to-back doubles by César Gerónimo and Dave Concepción made the score 7–2 and essentially blew the game open. The Cincinnati Reds outscored the New York Yankees, 22–8, and became the first NL team to repeat as World Champions since the 1921–1922 New York Giants. The Reds did not make a single offensive or defensive substitution (save pitching changes) during the entire series. Bench would claim the MVP of the series hitting .533 with two home runs and six runs batted in. His catching counterpart, Thurman Munson, had nine hits, all singles, and a .529 batting average.

answer:
b


question:
Question: Which team did Houston face in the finals of the AAC tournament the same year that they were regular season champions? Passage:On April 3, 2014, Houston hired Kelvin Sampson as the new Cougars head coach. Sampson had just become eligible to be a college coach again after receiving a five-year show cause penalty in 2008 for sanctions against him during his time as Indiana head coach. In 2014–15, Houston struggled again, finishing with a 13–19 record and 4–14 in the AAC. The 2015–16 team led a resurgence, finishing 22–10, 12–6, but lost in the AAC Tournament and in the first round of the NIT. In 2017–18, the Cougars compiled a 27–8 record, reaching the finals of the AAC Tournament and winning a game in the NCAA Tournament for the first time since 1984. In 2018–19, the Cougars' success continued as they set a program record for wins with a 33–4 mark. They were AAC regular-season champions but fell in the finals of the conference tournament. They proceeded to the NCAA Tournament, where they reached the Sweet Sixteen for the first time in 35 years.

answer:

b