Problem: Child labour:

In 1998, UNICEF reported that Ivory Coast farmers used enslaved children many from surrounding countries. In late 2000 a BBC documentary reported the use of enslaved children in the production of cocoathe main ingredient in chocolate in West Africa. Other media followed by reporting widespread child slavery and child trafficking in the production of cocoa. In 2001, the US State Department estimated there were 15,000 child slaves cocoa, cotton and coffee farms in the Ivory Coast, and the Chocolate Manufacturers Association acknowledged that child slavery is used in the cocoa harvest.[not in citation given][better source needed]

Who reported Ivory Coast farmers usage of child labour?
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A: UNICEF

Problem: To compete with the popular Family Computer in Japan, NEC Home Electronics launched the PC Engine in 1987, and Sega Enterprises followed suit with the Mega Drive in 1988. The two platforms were later launched in North America in 1989 as the TurboGrafx-16 and the Genesis respectively. Both systems were built on 16-bit architectures and offered improved graphics and sound over the 8-bit NES. However, it took several years for Sega's system to become successful. Nintendo executives were in no rush to design a new system, but they reconsidered when they began to see their dominance in the market slipping.
What was launched in North America in 1987?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Flower evolution continues to the present day; modern flowers have been so profoundly influenced by humans that some of them cannot be pollinated in nature. Many modern domesticated flower species were formerly simple weeds, which sprouted only when the ground was disturbed. Some of them tended to grow with human crops, perhaps already having symbiotic companion plant relationships with them, and the prettiest did not get plucked because of their beauty, developing a dependence upon and special adaptation to human affection.
Humans have effected some flowers so much they can no longer do what in nature?
A: pollinated

Context and question: Between 10 and 17 October 1757, a Hungarian general, Count Andras Hadik, serving in the Austrian army, executed what may be the most famous hussar action in history. When the Prussian King Frederick was marching south with his powerful armies, the Hungarian general unexpectedly swung his force of 5,000, mostly hussars, around the Prussians and occupied part of their capital, Berlin, for one night. The city was spared for a negotiated ransom of 200,000 thalers. When Frederick heard about this humiliating occupation, he immediately sent a larger force to free the city. Hadik, however, left the city with his Hussars and safely reached the Austrian lines. Subsequently, Hadik was promoted to the rank of Marshal in the Austrian army.
How was Berlin spared?
Answer: city was spared for a negotiated ransom of 200,000 thalers

Question: Hard rock is a form of loud, aggressive rock music. The electric guitar is often emphasised, used with distortion and other effects, both as a rhythm instrument using repetitive riffs with a varying degree of complexity, and as a solo lead instrument. Drumming characteristically focuses on driving rhythms, strong bass drum and a backbeat on snare, sometimes using cymbals for emphasis. The bass guitar works in conjunction with the drums, occasionally playing riffs, but usually providing a backing for the rhythm and lead guitars. Vocals are often growling, raspy, or involve screaming or wailing, sometimes in a high range, or even falsetto voice.
Is there an answer to this question: What do the vocals of rock songs try to avoid?

Answer: unanswerable

QUES: Other sources include fortified food and dietary supplements, which come in various forms. A 1998 review concluded that zinc oxide, one of the most common supplements in the United States, and zinc carbonate are nearly insoluble and poorly absorbed in the body. This review cited studies which found low plasma zinc concentrations after zinc oxide and zinc carbonate were consumed compared with those seen after consumption of zinc acetate and sulfate salts. However, harmful excessive supplementation is a problem among the relatively affluent, and should probably not exceed 20 mg/day in healthy people, although the U.S. National Research Council set a Tolerable Upper Intake of 40 mg/day.

What is the Intolerable Upper Intake of zinc?
What is the answer?
ANS:
unanswerable