Problem: Zinc:

Zinc is an essential mineral perceived by the public today as being of "exceptional biologic and public health importance", especially regarding prenatal and postnatal development. Zinc deficiency affects about two billion people in the developing world and is associated with many diseases. In children it causes growth retardation, delayed sexual maturation, infection susceptibility, and diarrhea. Enzymes with a zinc atom in the reactive center are widespread in biochemistry, such as alcohol dehydrogenase in humans. Consumption of excess zinc can cause ataxia, lethargy and copper deficiency.

In what substance can you find a zinc atom within its reactive center?
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A: alcohol dehydrogenase

Problem: Many towns in Croatia's Kvarner region (and in other parts of the country) observe the Carnival period, incorporating local traditions and celebrating local culture. Just before the end of Carnival, every Kvarner town burns a man-like doll called a "Jure Piskanac", who is blamed for all the strife of the previous year. The Zvoncari, or bell-ringers, wear bells and large head regalia representing their areas of origin (for example, those from Halubje wear regalia in the shape of animal heads). The traditional Carnival food is fritule, a pastry. This festival can also be called Poklade.
What is the traditional Carnival food?
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Answer: fritule

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Hunting and gathering was humanity's first and most successful adaptation, occupying at least 90 percent of human history. Following the invention of agriculture, hunter-gatherers have been displaced or conquered by farming or pastoralist groups in most parts of the world.
What are the basic types of agricultural groups?
A: farming or pastoralist groups

Context and question: Heat is energy in transit that flows due to temperature difference. Unlike heat transmitted by thermal conduction or thermal convection, thermal radiation can propagate through a vacuum. Thermal radiation is characterized by a particular spectrum of many wavelengths that is associated with emission from an object, due to the vibration of its molecules at a given temperature. Thermal radiation can be emitted from objects at any wavelength, and at very high temperatures such radiations are associated with spectra far above the infrared, extending into visible, ultraviolet, and even X-ray regions (i.e., the solar corona). Thus, the popular association of infrared radiation with thermal radiation is only a coincidence based on typical (comparatively low) temperatures often found near the surface of planet Earth.
What spectra is heat extended into?
Answer: unanswerable

Question: The Red Rose of Lancaster is the county flower found on the county's heraldic badge and flag. The rose was a symbol of the House of Lancaster, immortalised in the verse "In the battle for England's head/York was white, Lancaster red" (referring to the 15th-century Wars of the Roses). The traditional Lancashire flag, a red rose on a white field, was not officially registered. When an attempt was made to register it with the Flag Institute it was found that it was officially registered by Montrose in Scotland, several hundred years earlier with the Lyon Office. Lancashire's official flag is registered as a red rose on a gold field.
Is there an answer to this question: What was Montrose's heraldic flag?

Answer: unanswerable

Problem: University of Kansas:

The site selected for the university was a hill known as Mount Oread, which was owned by former Kansas Governor Charles L. Robinson. Robinson and his wife Sara bestowed the 40-acre (16 ha) site to the State of Kansas in exchange for land elsewhere. The philanthropist Amos Adams Lawrence donated $10,000 of the necessary endowment fund, and the citizens of Lawrence raised the remaining cash by issuing notes backed by Governor Carney. On November 2, 1863, Governor Carney announced that Lawrence had met the conditions to get the state university, and the following year the university was officially organized. The school's Board of Regents held its first meeting in March 1865, which is the event that KU dates its founding from. Work on the first college building began later that year. The university opened for classes on September 12, 1866, and the first class graduated in 1873.

Who did the site of KU's construction originally belong to?
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A:
Charles L. Robinson