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In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
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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.
Link Information: The Efe are a group of part-time hunter-gatherer people living in the Ituri Rainforest of the Democratic Republic of Congo. Question: What modern day country did the Efe people populate?
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Answer: Democratic Republic of Congo

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Passage: Ibrahim was born in Cape Town on 9 October 1934, and was baptized Adolph Johannes Brand. He attended Trafalgar High School in Cape Town's District Six, and began piano lessons at the age of seven, making his professional debut at 15. He is of mixed-race heritage, making him a Coloured person according to the South African government. His mother played piano in a church, the musical style of which would remain an influence; in addition, he learned to play several genres of music during his youth in Cape Town, including marabi, mbaqanga, and American jazz. He became well known in jazz circles in Cape Town and Johannesburg. In 1959 and 1960, Ibrahim played with the Jazz Epistles group in Sophiatown, alongside saxophonist Kippie Moeketsi, trumpeter Hugh Masekela, trombonist Jonas Gwangwa (who were all in the orchestra of the musical King Kong that opened in Johannesburg in February 1959), bassist Johnny Gertze and drummer Makaya Ntshoko; in January 1960, the six musicians went into the Gallo studio and recorded the first full-length jazz LP by Black South African musicians, Jazz Epistle Verse One, with 500 copies being produced. Although the group avoided explicitly political activity, the apartheid government was suspicious of it and other jazz groups, and targeted them heavily during the increase in state repression following the Sharpeville massacre, and eventually, the Jazz Epistles broke up.
Link Information: According to the South African National Census of 2011, the population of the City of Cape Town metropolitan municipalityan area that includes suburbs and exurbs not always considered as part of Cape Townis 3,740,026 people Question: Which South African city that Ibrahim became a well known Jazz player has the highest population?
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Answer: Johannesburg

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Passage: During the reign of King Edward the Confessor a lady called Elviva (probably a Latin rendering of the Old English name lfgifu), held the manor of Ambrosden. The Domesday Book records that by 1086 she had been replaced by Hugh d'Ivry, butler of William the Conqueror and brother of Roger d'Ivry, who owned several manors in Oxfordshire. Hugh's nephew Roger II d'Ivry inherited Ambrosden and by 1194 it was part of the Honour of St. Valery. Ambrosden thus passed to Edmund, 2nd Earl of Cornwall, who in 1288 gave the manor to Ashridge Priory of the Augustinian order of the Brothers of Penitence. Ashridge Priory retained Ambrosden until the priory was dissolved in 1539 in the Dissolution of the Monasteries.
Link Information: none Question: How old was Hugh D'Ivry's brother when he held the manor in 1086?
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Answer: none