Problem: Buddhism:

The teachings on the Four Noble Truths are regarded as central to the teachings of Buddhism, and are said to provide a conceptual framework for Buddhist thought. These four truths explain the nature of dukkha (suffering, anxiety, unsatisfactoriness), its causes, and how it can be overcome. The four truths are:[note 4]

The four truths explain the nature of what?
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A: dukkha

Problem: Architectural classicism is heavily represented in all districts of the city, particularly in Downtown, the Fan, and the Museum District. Several notable classical architects have designed buildings in Richmond. The Virginia State Capitol was designed by Thomas Jefferson and Charles-Louis Clerisseau in 1785. It is the second-oldest US statehouse in continuous use (after Maryland's) and was the first US government building built in the neo-classical style of architecture, setting the trend for other state houses and the federal government buildings (including the White House and The Capitol) in Washington, D.C. Robert Mills designed Monumental Church on Broad Street. Adjoining it is the 1845 Egyptian Building, one of the few Egyptian Revival buildings in the United States.
What is the architectural style of the 1845 Egyptian Building?
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Answer: Egyptian Revival

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
On 13 December 1904, Hungarian Sandor Just and Croatian Franjo Hanaman were granted a Hungarian patent (No. 34541) for a tungsten filament lamp that lasted longer and gave brighter light than the carbon filament. Tungsten filament lamps were first marketed by the Hungarian company Tungsram in 1904. This type is often called Tungsram-bulbs in many European countries. Filling a bulb with an inert gas such as argon or nitrogen retards the evaporation of the tungsten filament compared to operating it in a vacuum. This allows for greater temperatures and therefore greater efficacy with less reduction in filament life.
What type of gas does not fill a tungsten filament bulb?
A: unanswerable

Context and question: International teams also play friendlies, generally in preparation for the qualifying or final stages of major tournaments. This is essential, since national squads generally have much less time together in which to prepare. The biggest difference between friendlies at the club and international levels is that international friendlies mostly take place during club league seasons, not between them. This has on occasion led to disagreement between national associations and clubs as to the availability of players, who could become injured or fatigued in a friendly.
What do friendlies help international teams prepare for?
Answer: the qualifying or final stages of major tournaments

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.
Is there an answer to this question: How is paper cut for sale in South America?

Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The US Congress was urged to create the exemption by proponents of a conservation plan on San Bruno Mountain, California that was drafted in the early 1980s and is the first HCP in the nation. In the conference report on the 1982 amendments, Congress specified that it intended the San Bruno plan to act "as a model" for future conservation plans developed under the incidental take exemption provision and that "the adequacy of similar conservation plans should be measured against the San Bruno plan". Congress further noted that the San Bruno plan was based on "an independent exhaustive biological study" and protected at least 87% of the habitat of the listed butterflies that led to the development of the HCP.
What location held the first HCP?
A:
San Bruno Mountain, California