The problem: Answer a question about this article:
Economists argue that one of the factors behind the differing economic development in Africa and Asia is that in Africa, corruption has primarily taken the form of rent extraction with the resulting financial capital moved overseas rather than invested at home (hence the stereotypical, but often accurate, image of African dictators having Swiss bank accounts). In Nigeria, for example, more than $400 billion was stolen from the treasury by Nigeria's leaders between 1960 and 1999.
African dictators often have what kind of bank accounts?
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The answer: Swiss


The problem: Answer a question about this article:
The most widely used class of antenna, a dipole antenna consists of two symmetrical radiators such as metal rods or wires, with one side of the balanced feedline from the transmitter or receiver attached to each. A horizontal dipole radiates in two lobes perpendicular to the antenna's axis. A half-wave dipole the most common type, has two collinear elements each a quarter wavelength long and a gain of 2.15 dBi. Used individually as low gain antennas, dipoles are also used as driven elements in many more complicated higher gain types of antennas.
Besides low gain antennas, what is also used as driven elements in complicated higher gain types of antennas?
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The answer: dipoles


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The Compact Disc is an evolution of LaserDisc technology, where a focused laser beam is used that enables the high information density required for high-quality digital audio signals. Prototypes were developed by Philips and Sony independently in the late 1970s. In 1979, Sony and Philips set up a joint task force of engineers to design a new digital audio disc. After a year of experimentation and discussion, the Red Book CD-DA standard was published in 1980. After their commercial release in 1982, compact discs and their players were extremely popular. Despite costing up to $1,000, over 400,000 CD players were sold in the United States between 1983 and 1984. The success of the compact disc has been credited to the cooperation between Philips and Sony, who came together to agree upon and develop compatible hardware. The unified design of the compact disc allowed consumers to purchase any disc or player from any company, and allowed the CD to dominate the at-home music market unchallenged.
What did the CD evolve from?
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The answer: LaserDisc


The problem: Answer a question about this article:
In the 2nd century CE, Mahayana Sutras spread to China, and then to Korea and Japan, and were translated into Chinese. During the Indian period of Esoteric Buddhism (from the 8th century onwards), Buddhism spread from India to Tibet and Mongolia.
When did Buddhism apread from India to Tibet?
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The answer:
8th century onwards