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.
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Question: Question: What modern day country did the Efe people populate? Passage:In modern times, the creation of relatively simple dome-like structures has been documented among various indigenous peoples around the world. The wigwam was made by Native Americans using arched branches or poles covered with grass or hides. The Efe people of central Africa construct similar structures, using leaves as shingles. Another example is the igloo, a shelter built from blocks of compact snow and used by the Inuit people, among others. The Himba people of Namibia construct "desert igloos" of wattle and daub for use as temporary shelters at seasonal cattle camps, and as permanent homes by the poor. Extraordinarily thin domes of sun-baked clay 20 feet in diameter, 30 feet high, and nearly parabolic in curve, are known from Cameroon.

Answer: b

Question: Question: Did the show that Lange starred in from 1971 to 1974 win any Emmys? Passage:Lange returned to television for a 1966 role on the series The Fugitive (1963). She starred from 1968 to 1970 on the television series, The Ghost & Mrs. Muir for which she earned two Emmy Awards and a Golden Globe Award nomination. This success was followed by three seasons on The New Dick Van Dyke Show as Dick Van Dyke's wife, Jenny Preston, from 1971 to 1974, after which she declined to return for a fourth season of the show. She also appeared in twelve television movies, one being Crowhaven Farm where she played the role of a witch. In 1977, she returned to the Broadway stage where her acting career had originally begun. She also played the murdered wife of Charles Bronson's vigilante character in Death Wish (1974). In 1985, she appeared in , and in 1986, she took a role as Laura Dern's mother in David Lynch's Blue Velvet. She took a Broadway role in Same Time, Next Year and then made appearances in the television movie based on Danielle Steel's Message from Nam and in Clear and Present Danger (1994).

Answer: a

Question: Question: How old was the Duke of Saxony when he appointed Adolf I to hold Holstein and Stormarn? Passage:He was appointed to hold as fiefs Holstein and Stormarn, including Hamburg, by Lothair, Duke of Saxony, in 1111. By this appointment Adolf became the leader of the defence of Germany against the Wagri. Allied with Henry, the prince of the Obotrites, he repeatedly waged war on Wagria and the Rugians. After Henry's death (1127), Adolf remained allied with his sons Canute and Sventepolk, but they were soon dead and Lothair, by then King of Germany, had made Canute Lavard, a Danish prince, Duke of Schleswig. Feeling his authority threatened by the Danish upstart, Adolf attacked his castle of Albergs, captured the garrison, and destroyed its defences. He left his counties intact to his second son, Adolf II, since his eldest, Hartung, had been killed in the Second Battle of Chlumec in 1126.

Answer:
a