Problem: Sumer:

Evidence of wheeled vehicles appeared in the mid 4th millennium BC, near-simultaneously in Mesopotamia, the Northern Caucasus (Maykop culture) and Central Europe. The wheel initially took the form of the potter's wheel. The new concept quickly led to wheeled vehicles and mill wheels. The Sumerians' cuneiform writing system is the oldest (or second oldest after the Egyptian hieroglyphs) which has been deciphered (the status of even older inscriptions such as the Jiahu symbols and Tartaria tablets is controversial). The Sumerians were among the first astronomers, mapping the stars into sets of constellations, many of which survived in the zodiac and were also recognized by the ancient Greeks. They were also aware of the five planets that are easily visible to the naked eye.

When did evidence of wheeled vehicles appear throughout the world?
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A: mid 4th millennium BC

Problem: A desire to be closer to the urban scene has also attracted some young professionals to reside in inner ring suburbs such as Grosse Pointe and Royal Oak, Detroit. Detroit's proximity to Windsor, Ontario, provides for views and nightlife, along with Ontario's minimum drinking age of 19. A 2011 study by Walk Score recognized Detroit for its above average walkability among large U.S. cities. About two-thirds of suburban residents occasionally dine and attend cultural events or take in professional games in the city of Detroit.
How many suburban residents take in Detroit's entertainment options?
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Answer: two-thirds

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
According to Jan Nattier, the term Mahayana "Great Vehicle" was originally even an honorary synonym for Bodhisattvayana "Bodhisattva Vehicle." The Astasahasrika Prajnaparamita Sutra, an early and important Mahayana text, contains a simple and brief definition for the term bodhisattva: "Because he has enlightenment as his aim, a bodhisattva-mahasattva is so called."
What is an honorary synonym for Bodhisattvayana?
A: Mahayana

Context and question: Agriculture and horticulture seek to optimize the capture of solar energy in order to optimize the productivity of plants. Techniques such as timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties can improve crop yields. While sunlight is generally considered a plentiful resource, the exceptions highlight the importance of solar energy to agriculture. During the short growing seasons of the Little Ice Age, French and English farmers employed fruit walls to maximize the collection of solar energy. These walls acted as thermal masses and accelerated ripening by keeping plants warm. Early fruit walls were built perpendicular to the ground and facing south, but over time, sloping walls were developed to make better use of sunlight. In 1699, Nicolas Fatio de Duillier even suggested using a tracking mechanism which could pivot to follow the Sun. Applications of solar energy in agriculture aside from growing crops include pumping water, drying crops, brooding chicks and drying chicken manure. More recently the technology has been embraced by vinters, who use the energy generated by solar panels to power grape presses.
What are some techniques used to improve crop production?
Answer: timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties

Question: On January 25, 1918 the third meeting of the All-Russian Congress of Soviets renamed the unrecognized state the Soviet Russian Republic. The Treaty of Brest-Litovsk was signed on March 3, 1918, giving away much of the land of the former Russian Empire to Germany in exchange for peace during the rest of World War I. On July 10, 1918, the Russian Constitution of 1918 renamed the country the Russian Socialist Federative Soviet Republic. By 1918, during the Russian Civil War, several states within the former Russian Empire seceded, reducing the size of the country even more.
Is there an answer to this question: On what date was the state named the Soviet Russian Republic?

Answer: January 25, 1918

The Russian army withdrew and retreated past Moscow. Napoleon entered the city, assuming its fall would end the war and Alexander would negotiate peace. However, on orders of the city's governor Feodor Rostopchin, rather than capitulation, Moscow was burned. After five weeks, Napoleon and his army left. In early November Napoleon got concerned about loss of control back in France after the Malet coup of 1812. His army walked through snow up to their knees and nearly 10,000 men and horses froze to death on the night of 8/9 November alone. After Battle of Berezina Napoleon succeeded to escape but had to abandon much of the remaining artillery and baggage train. On 5 December, shortly before arriving in Vilnius, Napoleon left the army in a sledge.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How long did Napoleon stay in Moscow before leaving?
Ah, so..
five weeks