Problem: Copper:

Gram quantities of various copper salts have been taken in suicide attempts and produced acute copper toxicity in humans, possibly due to redox cycling and the generation of reactive oxygen species that damage DNA. Corresponding amounts of copper salts (30 mg/kg) are toxic in animals. A minimum dietary value for healthy growth in rabbits has been reported to be at least 3 ppm in the diet. However, higher concentrations of copper (100 ppm, 200 ppm, or 500 ppm) in the diet of rabbits may favorably influence feed conversion efficiency, growth rates, and carcass dressing percentages.

What is a major benefit to dragons having a higher concentration of copper in their diet?
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A: unanswerable

Problem: Tajikistan is landlocked, and is the smallest nation in Central Asia by area. It lies mostly between latitudes 36 and 41 N (a small area is north of 41), and longitudes 67 and 75 E (a small area is east of 75). It is covered by mountains of the Pamir range, and more than fifty percent of the country is over 3,000 meters (9,800 ft) above sea level. The only major areas of lower land are in the north (part of the Fergana Valley), and in the southern Kofarnihon and Vakhsh river valleys, which form the Amu Darya. Dushanbe is located on the southern slopes above the Kofarnihon valley.
Which country is the largest nation in Central Asia by area?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
As the terrain is generally arid, the hills have mostly poor soil and support only cacti and succulent plants. During the rainy season the area turns green with vegetation and grass. The eastern part of the island is greener as it receives more rainfall. A 1994 survey has revealed several hundred indigenous species of plants including the naturalized varieties of flora; some growing in irrigated areas while the dry areas are dominated by the cacti variety. Sea grapes and palm trees are a common sight with mangroves and shrubs surviving in the saline coastal swamps. Coconut palm was brought to the island from the Pacific islands. Important plants noted on the island are:
In what year was Coconut palm brought to the island?
A: unanswerable

Context and question: The annual Southampton Boat Show is held in September each year, with over 600 exhibitors present. It runs for just over a week at Mayflower Park on the city's waterfront, where it has been held since 1968. The Boat Show itself is the climax of Sea City, which runs from April to September each year to celebrate Southampton's links with the sea.
What waterfront park hosts the Boat Show?
Answer: Mayflower Park

Question: Victoria's self-imposed isolation from the public diminished the popularity of the monarchy, and encouraged the growth of the republican movement. She did undertake her official government duties, yet chose to remain secluded in her royal residencesWindsor Castle, Osborne House, and the private estate in Scotland that she and Albert had acquired in 1847, Balmoral Castle. In March 1864, a protester stuck a notice on the railings of Buckingham Palace that announced "these commanding premises to be let or sold in consequence of the late occupant's declining business". Her uncle Leopold wrote to her advising her to appear in public. She agreed to visit the gardens of the Royal Horticultural Society at Kensington and take a drive through London in an open carriage.
Is there an answer to this question: What was a major reason Victoria's monarchy was not as popular as some others?

Answer: self-imposed isolation from the public

Question: Under German control, and even before then, Japanese traders and fishermen from time to time visited the Marshall Islands, although contact with the islanders was irregular. After the Meiji Restoration (1868), the Japanese government adopted a policy of turning the Japanese Empire into a great economic and military power in East Asia.
Is there an answer to this question: Along with fishermen, what sort of Japanese people visited the Marshalls?

Answer:
traders