Problem: Copper:

Copper compounds in liquid form are used as a wood preservative, particularly in treating original portion of structures during restoration of damage due to dry rot. Together with zinc, copper wires may be placed over non-conductive roofing materials to discourage the growth of moss.[citation needed] Textile fibers use copper to create antimicrobial protective fabrics, as do ceramic glazes, stained glass and musical instruments. Electroplating commonly uses copper as a base for other metals such as nickel.

What function does copper serve when used in textile fibers?
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A: antimicrobial protective fabrics

Problem: In China, Yellow Emperor is regarded as the humanistic primogenitor.[citation needed] Sage kings such as Yao and Shun are humanistic figures as recorded.[citation needed] King Wu of Zhou has the famous saying: "Humanity is the Ling (efficacious essence) of the world (among all)." Among them Duke of Zhou, respected as a founder of Rujia (Confucianism), is especially prominent and pioneering in humanistic thought. His words were recorded in the Book of History as follows (translation):[citation needed]
Who was known as being a founder of humanism thought in Finland?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Finalist Phillip Phillips suffered from kidney pain and was taken to the hospital before the Top 13 results show, and later received medical procedure to alleviate a blockage caused by kidney stones. He was reported to have eight surgeries during his Idol run, and had considered quitting the show due to the pain. He underwent surgery to remove the stones and reconstruct his kidney soon after the season had finished.
Why was Phillip Phillips hospitalized during his time on American Idol?
A: kidney stones

Context and question: Some sections of the state feature architectural styles including Spanish revival, Florida vernacular, and Mediterranean Revival Style. It has the largest collection of Art Deco and Streamline Moderne buildings in both the United States and the entire world, most of which are located in the Miami metropolitan area, especially Miami Beach's Art Deco District, constructed as the city was becoming a resort destination. A unique architectural design found only in Florida is the post-World War II Miami Modern, which can be seen in areas such as Miami's MiMo Historic District.
What architectural styles are in Florida
Answer: architectural styles including Spanish revival, Florida vernacular, and Mediterranean Revival Style

Question: Agricultural diversity can also be divided by whether it is 'planned' diversity or 'associated' diversity. This is a functional classification that we impose and not an intrinsic feature of life or diversity. Planned diversity includes the crops which a farmer has encouraged, planted or raised (e.g.: crops, covers, symbionts and livestock, among others), which can be contrasted with the associated diversity that arrives among the crops, uninvited (e.g.: herbivores, weed species and pathogens, among others).
Is there an answer to this question: What type of diversity includes the crops which a farmer has encouraged, planted or raised?

Answer: Planned diversity

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The Delhi Flying Club, established in 1928 with two de Havilland Moth aircraft named Delhi and Roshanara, was based at Safdarjung Airport which started operations in 1929, when it was the Delhi's only airport and the second in India. The airport functioned until 2001, however in January 2002 the government closed the airport for flying activities because of security concerns following the New York attacks in September 2001. Since then, the club only carries out aircraft maintenance courses, and is used for helicopter rides to Indira Gandhi International Airport for VIP including the president and the prime minister.
In what year did the government close Safdarjung Airport due to security concerns?
A:
2002