Problem: Tucson, Arizona:

Jesuit missionary Eusebio Francisco Kino visited the Santa Cruz River valley in 1692, and founded the Mission San Xavier del Bac in 1700 about 7 mi (11 km) upstream from the site of the settlement of Tucson. A separate Convento settlement was founded downstream along the Santa Cruz River, near the base of what is now "A" mountain. Hugo O'Conor, the founding father of the city of Tucson, Arizona authorized the construction of a military fort in that location, Presidio San Agustin del Tucson, on August 20, 1775 (near the present downtown Pima County Courthouse). During the Spanish period of the presidio, attacks such as the Second Battle of Tucson were repeatedly mounted by Apaches. Eventually the town came to be called "Tucson" and became a part of Sonora after Mexico gained independence from Spain in 1821.

Who is Tucson's 'founding father'?
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A: Hugo O'Conor

Problem: Daylight saving has caused controversy since it began. Winston Churchill argued that it enlarges "the opportunities for the pursuit of health and happiness among the millions of people who live in this country" and pundits have dubbed it "Daylight Slaving Time". Historically, retailing, sports, and tourism interests have favored daylight saving, while agricultural and evening entertainment interests have opposed it, and its initial adoption had been prompted by energy crisis and war.
Traditionally, retailing, tourism, and what other industry have been in favor of DST?
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Answer: sports

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Before World War II, Guam and three other territories American Samoa, Hawaii, and the Philippines were the only American jurisdictions in the Pacific Ocean. On December 7, 1941, hours after the attack on Pearl Harbor, Guam was captured by the Japanese, and was occupied for thirty months. During the occupation, Guamanians were subjected to culture alignment, forced labor, beheadings, rape, and torture. Guam endured hostilities when American forces recaptured the island on July 21, 1944; Liberation Day commemorates the victory. Since the 1960s, the economy is supported by two industries: tourism and the United States Armed Forces.
On what date did World War II start?
A: unanswerable

Context and question: The marriage of Richard II of England to Anne of Bohemia established contacts between the two nations and brought Lollard ideas to her homeland. The teachings of the Czech priest Jan Hus were based on those of John Wycliffe, yet his followers, the Hussites, were to have a much greater political impact than the Lollards. Hus gained a great following in Bohemia, and in 1414, he was requested to appear at the Council of Constance to defend his cause. When he was burned as a heretic in 1415, it caused a popular uprising in the Czech lands. The subsequent Hussite Wars fell apart due to internal quarrels and did not result in religious or national independence for the Czechs, but both the Catholic Church and the German element within the country were weakened.
What conflict resulted from birth of Jan Hus?
Answer: unanswerable

Question: The concentration of copper in ores averages only 0.6%, and most commercial ores are sulfides, especially chalcopyrite (CuFeS2) and to a lesser extent chalcocite (Cu2S). These minerals are concentrated from crushed ores to the level of 1015% copper by froth flotation or bioleaching. Heating this material with silica in flash smelting removes much of the iron as slag. The process exploits the greater ease of converting iron sulfides into its oxides, which in turn react with the silica to form the silicate slag, which floats on top of the heated mass. The resulting copper matte consisting of Cu2S is then roasted to convert all sulfides into oxides:
Is there an answer to this question: What happens to the silicate slag during the flash smelting process?

Answer: floats on top

Problem: Antenna (radio):

Loop antennas consist of a loop or coil of wire. Loops with circumference of a wavelength or larger act similarly to dipole antennas. However loops small in comparison to a wavelength act differently. They interact with the magnetic field of the radio wave instead of the electric field as other antennas do, and so are relatively insensitive to nearby electrical noise. However they have low radiation resistance, and so are inefficient for transmitting. They are used as receiving antennas at low frequencies, and also as direction finding antennas.

What is a loop antenna compared with to determine its beahvior?
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A:
circumference of a wavelength