The problem: Answer a question about this article:
Lasers emitting in the red region of the spectrum have been available since the invention of the ruby laser in 1960. In 1962 the red helium–neon laser was invented, and these two types of lasers were widely used in many scientific applications including holography, and in education. Red helium–neon lasers were used commercially in LaserDisc players. The use of red laser diodes became widespread with the commercial success of modern DVD players, which use a 660 nm laser diode technology. Today, red and red-orange laser diodes are widely available to the public in the form of extremely inexpensive laser pointers. Portable, high-powered versions are also available for various applications. More recently, 671 nm diode-pumped solid state (DPSS) lasers have been introduced to the market for all-DPSS laser display systems, particle image velocimetry, Raman spectroscopy, and holography.
What type of laser diode is used in a DVD player?
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The answer: a 660 nm laser


The problem: Answer a question about this article:
The 1977 Knesset elections marked a major turning point in Israeli political history as Menachem Begin's Likud party took control from the Labor Party. Later that year, Egyptian President Anwar El Sadat made a trip to Israel and spoke before the Knesset in what was the first recognition of Israel by an Arab head of state. In the two years that followed, Sadat and Begin signed the Camp David Accords (1978) and the Israel–Egypt Peace Treaty (1979). In return, Israel withdrew from the Sinai Peninsula, which Israel had captured during the Six-Day War in 1967, and agreed to enter negotiations over an autonomy for Palestinians in the West Bank and the Gaza Strip.
Where did Anwar El Sadat make a trip to?
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The answer: Israel


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The vicereine Germaine of Foix brutally repressed the uprising and its leaders, and this accelerated the authoritarian centralisation of the government of Charles I. Queen Germaine favoured harsh treatment of the agermanats. She is thought to have signed the death warrants of 100 former rebels personally, and sources indicate that as many as 800 executions may have occurred. The agermanats are comparable to the comuneros of neighbouring Castile, who fought a similar revolt against Charles from 1520–1522.
Who suppressed agermanats' uprising?
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The answer: Germaine of Foix


The problem: Answer a question about this article:
The considerable spending did not lead to more growth and did not benefit the poor. Much of the increased spending has gone to current expenditures related to wages, transfers, and subsidies. The wage bill today constitutes over 15% of GDP and 55% of total public spending; these are some of the highest levels on the African continent. The recent rapid growth in SACU revenues has, however, reversed the fiscal situation, and a sizeable surplus was recorded since 2006. SACU revenues today account for over 60% of total government revenues. On the positive side, the external debt burden has declined markedly over the last 20 years, and domestic debt is almost negligible; external debt as a percent of GDP was less than 20% in 2006.
What amount of total public spending in Swaziland is going to wages?
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The answer:
55%