The problem: Answer a question about this article:
Due to the expansion of trade and its geographical proximity, Kiev became the most important trade centre and chief among the communes; therefore the leader of Kiev gained political "control" over the surrounding areas. This princedom emerged from a coalition of traditional patriarchic family communes banded together in an effort to increase the applicable workforce and expand the productivity of the land. This union developed the first major cities in the Rus' and was the first notable form of self-government. As these communes became larger, the emphasis was taken off the family holdings and placed on the territory that surrounded. This shift in ideology became known as the verv'.
How did the leader of Kiev gain political control?
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The answer: Due to the expansion of trade

Problem: Please answer a question about the following article about Light-emitting diode:
Nakamura was awarded the 2006 Millennium Technology Prize for his invention. Nakamura, Hiroshi Amano and Isamu Akasaki were awarded the Nobel Prize in Physics in 2014 for the invention of the blue LED. In 2015, a US court ruled that three companies (i.e. the litigants who had not previously settled out of court) that had licensed Mr. Nakamura's patents for production in the United States had infringed Dr. Moustakas's prior patent, and order them to pay licensing fees of not less than 13 million USD.
What Nobel Prize did Nakamura, Amano, and Akasaki receive in 2014?
A: Physics

Question: Read this and answer the question

The first settlement is defined as Paleapolis (), the Ancient Greek world for "old city", in order to distinguish it from a second settlement built during the 5th century BC, called Neapolis (), "new city". The neapolis was erected towards the east and along with it, monumental walls around the whole settlement were built to prevent attacks from foreign threats. Some part of this structure can still be seen in the Cassaro district. This district was named after the walls themselves; the word Cassaro deriving from the Arab al-qsr (castle, stronghold). Along the walls there were few doors to access and exit the city, suggesting that trade even toward the inner part of the island occurred frequently. Moreover, according to some studies, it may be possible that there were some walls that divided the old city from the new one too. The colony developed around a central street (decumanus), cut perpendicularly by minor streets. This street today has become the Corso Vittorio Emanuele.

Which district was named for the walls surrounding it?
Answer: Cassaro

Problem: Just as artist and inventor Leonardo da Vinci partaking of the zeitgeist though not himself a humanist advocated study of human anatomy, nature, and weather to enrich Renaissance works of art, so Spanish-born humanist Juan Luis Vives (c. 14931540) advocated observation, craft, and practical techniques to improve the formal teaching of Aristotelian philosophy at the universities, helping to free them from the grip of Medieval Scholasticism. Thus, the stage was set for the adoption of an approach to natural philosophy, based on empirical observations and experimentation of the physical universe, making possible the advent of the age of scientific inquiry that followed the Renaissance.
What type of philosophy was essential to this forwarding of thought?
The answer is the following: Aristotelian

On July 5, 1779, 2,600 loyalists and British regulars under General William Tryon, governor of New York, landed in New Haven Harbor and raided the 3,500-person town. A militia of Yale students had been prepping for battle, and former Yale president and Yale Divinity School professor Naphtali Daggett rode out to confront the Redcoats. Yale president Ezra Stiles recounted in his diary that while he moved furniture in anticipation of battle, he still couldn't quite believe the revolution had begun. New Haven was not torched as the invaders did with Danbury in 1777, or Fairfield and Norwalk a week after the New Haven raid, so many of the town's colonial features were preserved.
The students of what New Haven university formed an ad-hoc militia to confront the Redcoats?
Yale

Here is a question about this article: Arnold, Constable was the first American department store. It was founded in 1825 by Aaron Arnold (1794?-1876), an emigrant from Great Britain, as a small dry goods store on Pine Street in New York City. In 1857 the store moved into a five-story white marble dry goods palace known as the Marble House. During the Civil War Arnold, Constable was one of the first stores to issue charge bills of credit to its customers each month instead of on a bi-annual basis. Recognized as an emporium for high-quality fashions, the store soon outgrew the Marble House and erected a cast-iron building on Broadway and Nineteenth Street in 1869; this "Palace of Trade" expanded over the years until it was necessary to move into a larger space in 1914. In 1925, Arnold, Constable merged with Stewart & Company and expanded into the suburbs, first with a 1937 store in New Rochelle, New York and later in Hempstead and Manhasset on Long Island, and in New Jersey. Financial problems led to bankruptcy in 1975.
What is the answer to this question: When was the "Palace of Trade" built?
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So...
1869