Problem: Political corruption:

In the 1990s, initiatives were taken at an international level (in particular by the European Community, the Council of Europe, the OECD) to put a ban on corruption: in 1996, the Committee of Ministers of the Council of Europe, for instance, adopted a comprehensive Programme of Action against Corruption and, subsequently, issued a series of anti-corruption standard-setting instruments:

What decade saw international initiatives to combat corruption?
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A: 1990s

Problem: Astronomers like Hipparchus (c.190 c.120 BC) built upon the measurements of the Babylonian astronomers before him, to measure the precession of the Earth. Pliny reports that Hipparchus produced the first systematic star catalog after he observed a new star (it is uncertain whether this was a nova or a comet) and wished to preserve astronomical record of the stars, so that other new stars could be discovered. It has recently been claimed that a celestial globe based on Hipparchus's star catalog sits atop the broad shoulders of a large 2nd-century Roman statue known as the Farnese Atlas. Another astronomer, Aristarchos of Samos developed a heliocentric system.
Hipparchus' star may be depicted in a statue called what?
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Answer: Farnese Atlas

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Rowing has been popular in Philadelphia since the 18th century. Boathouse Row is a symbol of Philadelphia's rich rowing history, and each Big Five member has its own boathouse. Philadelphia hosts numerous local and collegiate rowing clubs and competitions, including the annual Dad Vail Regatta, the largest intercollegiate rowing event in the U.S, the Stotesbury Cup Regatta, and the Head of the Schuylkill Regatta, all of which are held on the Schuylkill River. The regattas are hosted and organized by the Schuylkill Navy, an association of area rowing clubs that has produced numerous Olympic rowers.
Where are these races held?
A: Schuylkill River

Context and question: Solar thermal power stations include the 354 megawatt (MW) Solar Energy Generating Systems power plant in the USA, Solnova Solar Power Station (Spain, 150 MW), Andasol solar power station (Spain, 100 MW), Nevada Solar One (USA, 64 MW), PS20 solar power tower (Spain, 20 MW), and the PS10 solar power tower (Spain, 11 MW). The 370 MW Ivanpah Solar Power Facility, located in California's Mojave Desert, is the world's largest solar-thermal power plant project currently under construction. Many other plants are under construction or planned, mainly in Spain and the USA. In developing countries, three World Bank projects for integrated solar thermal/combined-cycle gas-turbine power plants in Egypt, Mexico, and Morocco have been approved.
What is the world's largest solar-thermal power plant project currently not under construction?
Answer: unanswerable

Question: Karl Popper's rejection of Marxism during his teenage years left a profound mark on his thought. He had at one point joined a socialist association, and for a few months in 1919 considered himself a communist. During this time he became familiar with the Marxist view of economics, class-war, and history. Although he quickly became disillusioned with the views expounded by Marxism, his flirtation with the ideology led him to distance himself from those who believed that spilling blood for the sake of a revolution was necessary. He came to realise that when it came to sacrificing human lives, one was to think and act with extreme prudence.
Is there an answer to this question: For a time during which year did Popper consider himself a communist?

Answer: 1919

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The word "mammal" is modern, from the scientific name Mammalia coined by Carl Linnaeus in 1758, derived from the Latin mamma ("teat, pap"). All female mammals nurse their young with milk, which is secreted from special glands, the mammary glands. According to Mammal Species of the World, 5,416 species were known in 2006. These were grouped in 1,229 genera, 153 families and 29 orders. In 2008 the IUCN completed a five-year, 1,700-scientist Global Mammal Assessment for its IUCN Red List, which counted 5,488 accepted species.
How many accepted species are there according to Carl Linnaeus?
A:
unanswerable