Problem: YouTube:

On March 31, 2010, the YouTube website launched a new design, with the aim of simplifying the interface and increasing the time users spend on the site. Google product manager Shiva Rajaraman commented: "We really felt like we needed to step back and remove the clutter." In May 2010, it was reported that YouTube was serving more than two billion videos a day, which it described as "nearly double the prime-time audience of all three major US television networks combined". In May 2011, YouTube reported in its company blog that the site was receiving more than three billion views per day. In January 2012, YouTube stated that the figure had increased to four billion videos streamed per day.

Who was the Google product manager in 2010?
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A: Shiva Rajaraman


Problem: In 2010, the first year of the reconstituted league following bankruptcy, the overall attendance average decreased to 8,135, with only one team (Tampa Bay) exceeding 13,000 per game.
In the 2010 season, how many teams drew an average of more than 13,000 fans per game?
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Answer: one


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Measurement of light or photometry is generally concerned with the amount of useful light falling on a surface and the amount of light emerging from a lamp or other source, along with the colors that can be rendered by this light. The human eye responds differently to light from different parts of the visible spectrum, therefore photometric measurements must take the luminosity function into account when measuring the amount of useful light. The basic SI unit of measurement is the candela (cd), which describes the luminous intensity, all other photometric units are derived from the candela. Luminance for instance is a measure of the density of luminous intensity in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle. The SI unit for luminance is candela per square metre (cd/m2). The CGS unit of luminance is the stilb, which is equal to one candela per square centimetre or 10 kcd/m2. The amount of useful light emitted from a source or the luminous flux is measured in lumen (lm).
What is the basic SI unit of measurement?
A: candela (cd)


Context and question: By 500 BC, the Persian Empire controlled the Greek city states in Asia Minor and had made territorial gains in the Balkans and Eastern Europe proper as well. Attempts by some of the Greek city-states of Asia Minor to overthrow Persian rule failed, and Persia invaded the states of mainland Greece in 492 BC, but was forced to withdraw after a defeat at the Battle of Marathon in 490 BC. A second invasion by the Persians followed in 480 BC. Despite a heroic resistance at Thermopylae by Spartans and other Greeks led by King Leonidas, and a simultaneous naval engagement at Artemisium,[page needed] Persian forces occupied Athens, which had been evacuated in time, as well as briefly overrunning half of Greece. Following decisive Greek victories in 480 and 479 BC at Salamis, Plataea, and Mycale, the Persians were forced to withdraw for a second time, marking their eventual withdrawal from all of their European territories. Led by Athens and Sparta, the Greek victories in the Greco-Persian Wars are considered a pivotal moment in world history, as the 50 years of peace that followed are known as Golden Age of Athens, the seminal period of ancient Greece that laid many of the foundations of Western civilization.
What battle did Persia lose in 490 BC?
Answer: Battle of Marathon


Question: Since re-establishing independence, Estonia has styled itself as the gateway between East and West and aggressively pursued economic reform and integration with the West. Estonia's market reforms put it among the economic leaders in the former COMECON area.[citation needed] In 1994, based on the economic theories of Milton Friedman, Estonia became one of the first countries to adopt a flat tax, with a uniform rate of 26% regardless of personal income. In January 2005, the personal income tax rate was reduced to 24%. Another reduction to 23% followed in January 2006. The income tax rate was decreased to 21% by January 2008. The Government of Estonia finalised the design of Estonian euro coins in late 2004, and adopted the euro as the country's currency on 1 January 2011, later than planned due to continued high inflation. A Land Value Tax is levied which is used to fund local municipalities. It is a state level tax, however 100% of the revenue is used to fund Local Councils. The rate is set by the Local Council within the limits of 0.1–2.5%. It is one of the most important sources of funding for municipalities. The Land Value Tax is levied on the value of the land only with improvements and buildings not considered. Very few exemptions are considered on the land value tax and even public institutions are subject to the tax. The tax has contributed to a high rate (~90%) of owner-occupied residences within Estonia, compared to a rate of 67.4% in the United States.
Is there an answer to this question: What year did Estonia establish a flat tax?

Answer: 1994


During mutualistic symbioses, the host cell lacks some of the nutrients, which are provided by the endosymbiont. As a result, the host favors endosymbiont's growth processes within itself by producing some specialized cells. These cells affect the genetic composition of the host in order to regulate the increasing population of the endosymbionts and ensuring that these genetic changes are passed onto the offspring via vertical transmission (heredity).
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who offers a location for the host cell to vertically transmit nutrition?
Ah, so..
unanswerable