Problem: Incandescent light bulb:

An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a wire filament heated to a high temperature, by passing an electric current through it, until it glows with visible light (incandescence). The hot filament is protected from oxidation with a glass or quartz bulb that is filled with inert gas or evacuated. In a halogen lamp, filament evaporation is prevented by a chemical process that redeposits metal vapor onto the filament, extending its life. The light bulb is supplied with electric current by feed-through terminals or wires embedded in the glass. Most bulbs are used in a socket which provides mechanical support and electrical connections.

Which type of light bulb uses inert gas?
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A: incandescent light bulb


Problem: Biodiversity, a contraction of "biological diversity," generally refers to the variety and variability of life on Earth. One of the most widely used definitions defines it in terms of the variability within species, between species, and between ecosystems. It is a measure of the variety of organisms present in different ecosystems. This can refer to genetic variation, ecosystem variation, or species variation (number of species) within an area, biome, or planet. Terrestrial biodiversity tends to be greater near the equator, which seems to be the result of the warm climate and high primary productivity. Biodiversity is not distributed evenly on Earth. It is richest in the tropics. Marine biodiversity tends to be highest along coasts in the Western Pacific, where sea surface temperature is highest and in the mid-latitudinal band in all oceans. There are latitudinal gradients in species diversity. Biodiversity generally tends to cluster in hotspots, and has been increasing through time, but will be likely to slow in the future.
Where is sea surface biodiversity the highest?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The Canadian Army is headed by the Commander of the Canadian Army and administered through four divisions—the 2nd Canadian Division, the 3rd Canadian Division, the 4th Canadian Division and the 5th Canadian Division—the Canadian Army Doctrine and Training System and the Canadian Army Headquarters.
What are the four divisions?
A: the 2nd Canadian Division, the 3rd Canadian Division, the 4th Canadian Division and the 5th Canadian Division


Context and question: The MDNA Tour, which further promoted the album, began in May 2012 in Tel Aviv, Israel. The tour has received positive critical reception, but featured controversial subjects such as violence, firearms, human rights, nudity and politics. Lawsuits threatened against Madonna have also been engaged from the tour. It was a box office success with a gross of $305.2 million from 88 sold-out shows, and became the highest-grossing tour of 2012 and the tenth highest-grossing tour of all time. At the 2013 Billboard Music Awards, Madonna won three trophies for Top Touring Artist, Top Dance Artist and Top Dance Album. Madonna was named the top-earning celebrity of the year by Forbes, earning an estimated $125 million, due to the success of the tour.
When did MDNA Tour begin?
Answer: May 2012


Question: The young Feynman was heavily influenced by his father, who encouraged him to ask questions to challenge orthodox thinking, and who was always ready to teach Feynman something new. From his mother he gained the sense of humor that he had throughout his life. As a child, he had a talent for engineering, maintained an experimental laboratory in his home, and delighted in repairing radios. When he was in grade school, he created a home burglar alarm system while his parents were out for the day running errands.
Is there an answer to this question: What personality trait did Feynman hide from his mother?

Answer: unanswerable


QUES: A common misperception is that the Supreme Court is the only court that may determine constitutionality; the power is exercised even by the inferior courts. But only Supreme Court decisions are binding across the nation. Decisions of a Court of Appeals, for instance, are binding only in the circuit over which the court has jurisdiction.

Which courts' decisions, other than Supreme Court, are binding across the country?
What is the answer?
ANS:
unanswerable