This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Q: Passage: Children working at a young age has been a consistent theme throughout Africa. Many children began first working in the home to help their parents run the family farm. Children in Africa today are often forced into exploitative labour due to family debt and other financial factors, leading to ongoing poverty. Other types of domestic child labour include working in commercial plantations, begging, and other sales such as boot shining. In total, there is an estimated five million children who are currently working in the field of agriculture which steadily increases during the time of harvest. Along with 30 percent of children who are picking coffee, there are an estimated 25,000 school age children who work year round. Question: How many children in Africa pick coffee?

A: 30 percent
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Q: Passage: An electromagnetic wave refractor in some aperture antennas is a component which due to its shape and position functions to selectively delay or advance portions of the electromagnetic wavefront passing through it. The refractor alters the spatial characteristics of the wave on one side relative to the other side. It can, for instance, bring the wave to a focus or alter the wave front in other ways, generally in order to maximize the directivity of the antenna system. This is the radio equivalent of an optical lens. Question: What is used to allow one to control the function of wave fronts moving through an antenna?

A: selectively delay
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Q: Passage: Every continued in pursuit and managed to overhaul Ganj-i-Sawai, which resisted strongly before eventually striking. Ganj-i-Sawai carried enormous wealth and, according to contemporary East India Company sources, was carrying a relative of the Grand Mughal, though there is no evidence to suggest that it was his daughter and her retinue. The loot from the Ganj-i-Sawai had a total value between 325,000 and 600,000, including 500,000 gold and silver pieces, and has become known as the richest ship ever taken by pirates. Question: What was the total value of cargo on the Ganj-i-Sawai?

A:
325,000 and 600,000
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