Article: Later chapters provide evidence that evolution has occurred, supporting the idea of branching, adaptive evolution without directly proving that selection is the mechanism. Darwin presents supporting facts drawn from many disciplines, showing that his theory could explain a myriad of observations from many fields of natural history that were inexplicable under the alternate concept that species had been individually created. The structure of Darwin's argument showed the influence of John Herschel, whose philosophy of science maintained that a mechanism could be called a vera causa (true cause) if three things could be demonstrated: its existence in nature, its ability to produce the effects of interest, and its ability to explain a wide range of observations.

Question: What are the three things John Herschel maintains need to be shown to allow for a mechanism be called a true cause?
Ans: its existence in nature, its ability to produce the effects of interest, and its ability to explain a wide range of observations


Here is a question about this article: The earliest recorded account of a circadian process dates from the 4th century B.C.E., when Androsthenes, a ship captain serving under Alexander the Great, described diurnal leaf movements of the tamarind tree. The observation of a circadian or diurnal process in humans is mentioned in Chinese medical texts dated to around the 13th century, including the Noon and Midnight Manual and the Mnemonic Rhyme to Aid in the Selection of Acu-points According to the Diurnal Cycle, the Day of the Month and the Season of the Year.
What is the answer to this question: What ship captain described daily leaf movements?
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So... Androsthenes


The problem: Answer a question about this article:
Additionally, there are issues of connections between different electrical services, particularly connecting intercity lines with sections electrified for commuter traffic, but also between commuter lines built to different standards. This can cause electrification of certain connections to be very expensive simply because of the implications on the sections it is connecting. Many lines have come to be overlaid with multiple electrification standards for different trains to avoid having to replace the existing rolling stock on those lines. Obviously, this requires that the economics of a particular connection must be more compelling and this has prevented complete electrification of many lines. In a few cases, there are diesel trains running along completely electrified routes and this can be due to incompatibility of electrification standards along the route.
Why the commuter lines built to different standards can cause be complicated?
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The answer: the implications on the sections it is connecting


Problem: Please answer a question about the following article about Josip Broz Tito:
Tito was notable for pursuing a foreign policy of neutrality during the Cold War and for establishing close ties with developing countries. Tito's strong belief in self-determination caused early rift with Stalin and consequently, the Eastern Bloc. His public speeches often reiterated that policy of neutrality and cooperation with all countries would be natural as long as these countries did not use their influence to pressure Yugoslavia to take sides. Relations with the United States and Western European nations were generally cordial.
With whom did Tito's belief in self-determination cause a rift?
A: Stalin


Question: Read this and answer the question

In 2011, documents obtained by WikiLeaks revealed that Beyoncé was one of many entertainers who performed for the family of Libyan ruler Muammar Gaddafi. Rolling Stone reported that the music industry was urging them to return the money they earned for the concerts; a spokesperson for Beyoncé later confirmed to The Huffington Post that she donated the money to the Clinton Bush Haiti Fund. Later that year she became the first solo female artist to headline the main Pyramid stage at the 2011 Glastonbury Festival in over twenty years, and was named the highest-paid performer in the world per minute.

In which year was reports about Beyonce performing for Muammar Gaddafi surface?
Answer: 2011


In Armenia Russian has no official status, but it's recognised as a minority language under the Framework Convention for the Protection of National Minorities. According to estimates from Demoskop Weekly, in 2004 there were 15,000 native speakers of Russian in the country, and 1 million active speakers. 30% of the population was fluent in Russian in 2006, and 2% used it as the main language with family, friends or at work. Russian is spoken by 1.4% of the population according to a 2009 estimate from the World Factbook.
What percent of Armenia uses Russian as their main language?
2%