Problem: Geography of the United States:

In the east, while snowfall does not approach western levels, the region near the Great Lakes and the mountains of the Northeast receive the most. Along the northwestern Pacific coast, rainfall is greater than anywhere else in the continental U.S., with Quinault Rainforest in Washington having an average of 137 inches (348 cm). Hawaii receives even more, with 460 inches (1,168 cm) measured annually on Mount Waialeale, in Kauai. The Mojave Desert, in the southwest, is home to the driest locale in the U.S. Yuma, Arizona, has an average of 2.63 inches (6.7 cm) of precipitation each year.

Which region of the US receives the least amount of rainfall
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A: unanswerable

Problem: Since the Industrial Revolution some two hundred years ago, the food processing industry has invented many technologies that both help keep foods fresh longer and alter the fresh state of food as they appear in nature. Cooling is the primary technology used to maintain freshness, whereas many more technologies have been invented to allow foods to last longer without becoming spoiled. These latter technologies include pasteurisation, autoclavation, drying, salting, and separation of various components, all of which appearing to alter the original nutritional contents of food. Pasteurisation and autoclavation (heating techniques) have no doubt improved the safety of many common foods, preventing epidemics of bacterial infection. But some of the (new) food processing technologies have downfalls as well.
Apart from altering the state of food, what is the other main focus in technology increases for the food processing industry?
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Answer: keep foods fresh longer

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
On December 3, 2013, Adidas officially confirmed a new shoe collaboration deal with West. After months of anticipation and rumors, West confirmed the release of the Adidas Yeezy Boosts with a Twitter announcement directing fans to the domain yeezy.supply. In 2015, West unveiled his Yeezy Season clothing line, premiering Season 1 in collaboration with Adidas early in the year. The release of the Yeezy Boosts and the full Adidas collaboration was showcased in New York City on February 12, 2015, with free streaming to 50 cinemas in 13 countries around the world. An initial release of the Adidas Yeezy Boosts was limited to 9000 pairs to be available only in New York City via the Adidas smartphone app; the Adidas Yeezy Boosts were sold out within 10 minutes. The shoes released worldwide on February 28, 2015, were limited to select boutique stores and the Adidas UK stores. He followed with Season 2 later that year at New York Fashion Week. On February 11, West premiered his Yeezy Season 3 clothing line at Madison Square Garden in conjunction with the previewing of his album The Life of Pablo.
In what year did Kanye premier his Season line?
A: 2015

Context and question: Because the electron mobility is higher than the hole mobility for all semiconductor materials, a given bipolar npn transistor tends to be swifter than an equivalent pnp transistor. GaAs has the highest electron mobility of the three semiconductors. It is for this reason that GaAs is used in high-frequency applications. A relatively recent FET development, the high-electron-mobility transistor (HEMT), has a heterostructure (junction between different semiconductor materials) of aluminium gallium arsenide (AlGaAs)-gallium arsenide (GaAs) which has twice the electron mobility of a GaAs-metal barrier junction. Because of their high speed and low noise, HEMTs are used in satellite receivers working at frequencies around 12 GHz. HEMTs based on gallium nitride and aluminium gallium nitride (AlGaN/GaN HEMTs) provide a still higher electron mobility and are being developed for various applications.
What is quicker, a bipolar n-p-n transistor or a p-n-p transistor?
Answer: a given bipolar npn transistor

Question: When Ibn Sina was 22 years old, he lost his father. The Samanid dynasty came to its end in December 1004. Ibn Sina seems to have declined the offers of Mahmud of Ghazni, and proceeded westwards to Urgench in modern Turkmenistan, where the vizier, regarded as a friend of scholars, gave him a small monthly stipend. The pay was small, however, so Ibn Sina wandered from place to place through the districts of Nishapur and Merv to the borders of Khorasan, seeking an opening for his talents. Qabus, the generous ruler of Tabaristan, himself a poet and a scholar, with whom Ibn Sina had expected to find asylum, was on about that date (1012) starved to death by his troops who had revolted. Ibn Sina himself was at this time stricken by a severe illness. Finally, at Gorgan, near the Caspian Sea, Ibn Sina met with a friend, who bought a dwelling near his own house in which Ibn Sina lectured on logic and astronomy. Several of Ibn Sina's treatises were written for this patron; and the commencement of his Canon of Medicine also dates from his stay in Hyrcania.
Is there an answer to this question: What dynasty ended in the 10th century?

Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
J. Barrie Jones suggests that "amongst the works that Chopin intended for concert use, the four ballades and four scherzos stand supreme", and adds that "the Barcarolle Op. 60 stands apart as an example of Chopin's rich harmonic palette coupled with an Italianate warmth of melody." Temperley opines that these works, which contain "immense variety of mood, thematic material and structural detail", are based on an extended "departure and return" form; "the more the middle section is extended, and the further it departs in key, mood and theme, from the opening idea, the more important and dramatic is the reprise when it at last comes."
What piece does J. Barrie Jones pinpoint as a great example of Chopin's palette?
A:
the Barcarolle Op. 60