In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
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Question: Why were 78s more popular than 45s in 1954-55?, Context: Some of Elvis Presley's early singles on Sun Records might have sold more copies on 78 than on 45. This is because the majority of those sales in 1954–55 were to the "hillbilly" market in the South and Southwestern United States, where replacing the family 78 rpm player with a new 45 rpm player was a luxury few could afford at the time. By the end of 1957, RCA Victor announced that 78s accounted for less than 10% of Presley's singles sales, essentially announcing the death throes of the 78 rpm format. The last Presley single released on 78 in the United States was RCA Victor 20-7410, I Got Stung/One Night (1958), while the last 78 in the UK was RCA 1194, A Mess Of Blues/Girl Of My Best Friend (1960).

Answer: replacing the family 78 rpm player with a new 45 rpm player was a luxury few could afford


Question: What can a tree produce after it is mature?, Context: Different pieces of wood cut from a large tree may differ decidedly, particularly if the tree is big and mature. In some trees, the wood laid on late in the life of a tree is softer, lighter, weaker, and more even-textured than that produced earlier, but in other trees, the reverse applies. This may or may not correspond to heartwood and sapwood. In a large log the sapwood, because of the time in the life of the tree when it was grown, may be inferior in hardness, strength, and toughness to equally sound heartwood from the same log. In a smaller tree, the reverse may be true.

Answer: wood


Question: Kenyan citizens employed in the health field can be considered what due to preventable diseases?, Context: Diseases of poverty directly correlate with a country's economic performance and wealth distribution: Half of Kenyans live below the poverty level. Preventable diseases like malaria, HIV/AIDS, pneumonia, diarrhoea and malnutrition are the biggest burden, major child-killers, and responsible for much morbidity; weak policies, corruption, inadequate health workers, weak management and poor leadership in the public health sector are largely to blame. According to 2009 estimates, HIV prevalence is about 6.3% of the adult population. However, the 2011 UNAIDS Report suggests that the HIV epidemic may be improving in Kenya, as HIV prevalence is declining among young people (ages 15–24) and pregnant women. Kenya had an estimated 15 million cases of malaria in 2006.

Answer:
inadequate