The problem: Answer a question about this article:
In nature, the red color of blood comes from hemoglobin, the iron-containing protein found in the red blood cells of all vertebrates. The red color of the Grand Canyon and other geological features is caused by hematite or red ochre, both forms of iron oxide. It also causes the red color of the planet Mars. The red sky at sunset and sunrise is caused by an optical effect known as Rayleigh scattering, which, when the sun is low or below the horizon, increases the red-wavelength light that reaches the eye. The color of autumn leaves is caused by pigments called anthocyanins, which are produced towards the end of summer, when the green chlorophyll is no longer produced. One to two percent of the human population has red hair; the color is produced by high levels of the reddish pigment pheomelanin (which also accounts for the red color of the lips) and relatively low levels of the dark pigment eumelanin.
Why does a sky turn red when the evening comes?
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The answer: Rayleigh scattering


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High speed Internet connectivity has become more widely available at a reasonable cost and the cost of video capture and display technology has decreased. Consequently, personal videoconferencing systems based on a webcam, personal computer system, software compression and broadband Internet connectivity have become affordable to the general public. Also, the hardware used for this technology has continued to improve in quality, and prices have dropped dramatically. The availability of freeware (often as part of chat programs) has made software based videoconferencing accessible to many.
What has made videoconferencing accessible to many?
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The answer: The availability of freeware


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In Europe, Dutch is the majority language in the Netherlands (96%) and Belgium (59%) as well as a minority language in Germany and northern France's French Flanders, where it is in the ultimate stage of language death. Though Belgium as a whole is multilingual, the two regions into which the country is divided (Flanders, francophone Wallonia, bilingual Brussels and small 'facility' zones) are largely monolingual. The Netherlands and Belgium produce the vast majority of music, films, books and other media written or spoken in Dutch. Dutch is a monocentric language, with all speakers using the same standard form (authorized by the Dutch Language Union) based on a Dutch orthography employing the Latin alphabet when writing. In stark contrast to its written uniformity, Dutch lacks a prestige dialect and has a large dialectal continuum consisting of 28 main dialects, which can themselves be further divided into at least 600 distinguishable varieties.
What percentage of people in Belgium speak Dutch?
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The answer: 59%


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During Soviet rule, Armenian athletes rose to prominence winning plenty of medals and helping the USSR win the medal standings at the Olympics on numerous occasions. The first medal won by an Armenian in modern Olympic history was by Hrant Shahinyan, who won two golds and two silvers in gymnastics at the 1952 Summer Olympics in Helsinki. In football, their most successful team was Yerevan's FC Ararat, which had claimed most of the Soviet championships in the 70s and had also gone to post victories against professional clubs like FC Bayern Munich in the Euro cup.
What pro team has FC Ararat beaten?
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The answer:
FC Bayern Munich