Problem: North Carolina:

While the Baptists in total (counting both blacks and whites) have maintained the majority in this part of the country (known as the Bible Belt), the population in North Carolina practices a wide variety of faiths, including Judaism, Islam, Baha'i, Buddhism, and Hinduism. As of 2010 the Southern Baptist Church was the biggest denomination, with 4,241 churches and 1,513,000 members; the second largest was the United Methodist Church, with 660,000 members and 1,923 churches. The third was the Roman Catholic Church, with 428,000 members in 190 congregations. The fourth greatest was the Presbyterian Church (USA), with 186,000 members and 710 congregations; this denomination was brought by Scots-Irish immigrants who settled the backcountry in the colonial era.

What is the religious name given to the part of the country that includes the Carolinas?
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A: Bible Belt

Problem: Numerous modern mandolin makers build instruments that largely replicate the Gibson F-5 Artist models built in the early 1920s under the supervision of Gibson acoustician Lloyd Loar. Original Loar-signed instruments are sought after and extremely valuable. Other makers from the Loar period and earlier include Lyon and Healy, Vega and Larson Brothers. Some notable modern American carved mandolin manufacturers include, in addition to Kay, Gibson, Weber, Monteleone and Collings. Mandolins from other countries include The Loar (China), Santa, Rosa (China), Michael Kelly (Korea), Eastman (China), Kentucky (China), Heiden (Canada), Gilchrist (Australia) and Morgan Monroe (China).
What style of Gisbon Mandolin was never replicated?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Thousands of fonts exist on the market, but fewer than a dozen fontssometimes described as "pan-Unicode" fontsattempt to support the majority of Unicode's character repertoire. Instead, Unicode-based fonts typically focus on supporting only basic ASCII and particular scripts or sets of characters or symbols. Several reasons justify this approach: applications and documents rarely need to render characters from more than one or two writing systems; fonts tend to demand resources in computing environments; and operating systems and applications show increasing intelligence in regard to obtaining glyph information from separate font files as needed, i.e., font substitution. Furthermore, designing a consistent set of rendering instructions for tens of thousands of glyphs constitutes a monumental task; such a venture passes the point of diminishing returns for most typefaces.
How many fonts support the majority of Unicode's character repertoire?
A: fewer than a dozen fonts

Context and question: Most commercial paper sold in North America is cut to standard paper sizes based on customary units and is defined by the length and width of a sheet of paper.
Standard paper sizes are never described with what terms?
Answer: unanswerable

Question: North Carolina made the smallest per-capita contribution to the war of any state, as only 7,800 men joined the Continental Army under General George Washington; an additional 10,000 served in local militia units under such leaders as General Nathanael Greene. There was some military action, especially in 178081. Many Carolinian frontiersmen had moved west over the mountains, into the Washington District (later known as Tennessee), but in 1789, following the Revolution, the state was persuaded to relinquish its claim to the western lands. It ceded them to the national government so that the Northwest Territory could be organized and managed nationally.
Is there an answer to this question: What state made the smallest contribution to the revolutionary war of any state?

Answer: North Carolina

Problem: Railway electrification system:

Three-phase AC railway electrification was used in Italy, Switzerland and the United States in the early twentieth century. Italy was the major user, for lines in the mountainous regions of northern Italy from 1901 until 1976. The first lines were the Burgdorf-Thun line in Switzerland (1899), and the lines of the Ferrovia Alta Valtellina from Colico to Chiavenna and Tirano in Italy, which were electrified in 1901 and 1902. Other lines where the three-phase system were used were the Simplon Tunnel in Switzerland from 1906 to 1930, and the Cascade Tunnel of the Great Northern Railway in the United States from 1909 to 1927.

What country was a bigger user compare to the three of them?
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A:
Italy