Question: Read this and answer the question

The reign of the Qianlong Emperor (1735–1796) saw the apogee and initial decline in prosperity and imperial control. The population rose to some 400 million, but taxes and government revenues were fixed at a low rate, virtually guaranteeing eventual fiscal crisis. Corruption set in, rebels tested government legitimacy, and ruling elites did not change their mindsets in the face of changes in the world system. Following the Opium War, European powers imposed unequal treaties, free trade, extraterritoriality and treaty ports under foreign control. The Taiping Rebellion (1850–64) and Dungan Revolt (1862–77) in Central Asia led to the deaths of some 20 million people. In spite of these disasters, in the Tongzhi Restoration of the 1860s, Han Chinese elites rallied to the defense of the Confucian order and the Qing rulers. The initial gains in the Self-Strengthening Movement were destroyed in the First Sino-Japanese War of 1895, in which the Qing lost its influence over Korea and the possession of Taiwan. New Armies were organized, but the ambitious Hundred Days' Reform of 1898 was turned back by Empress Dowager Cixi, a ruthless but capable leader. When, in response to the violently anti-foreign Yihetuan ("Boxers"), foreign powers invaded China, the Empress Dowager declared war on them, leading to defeat and the flight of the Imperial Court to Xi'an.

When was the Dungan Revolt?
Answer: (1862–77)


Problem: The Union Internationale des Associations d'Alpinisme (UIAA) has defined a list of 82 "official" Alpine summits that reach at least 4,000 m (13,123 ft). The list includes not only mountains, but also subpeaks with little prominence that are considered important mountaineering objectives. Below are listed the 22 "four-thousanders" with at least 500 m (1,640 ft) of prominence.
What is included in the list of 82 official Apline summits other than Mountains?
The answer is the following: subpeaks with little prominence that are considered important mountaineering objectives


The maximum energy is a function of dielectric volume, permittivity, and dielectric strength. Changing the plate area and the separation between the plates while maintaining the same volume causes no change of the maximum amount of energy that the capacitor can store, so long as the distance between plates remains much smaller than both the length and width of the plates. In addition, these equations assume that the electric field is entirely concentrated in the dielectric between the plates. In reality there are fringing fields outside the dielectric, for example between the sides of the capacitor plates, which will increase the effective capacitance of the capacitor. This is sometimes called parasitic capacitance. For some simple capacitor geometries this additional capacitance term can be calculated analytically. It becomes negligibly small when the ratios of plate width to separation and length to separation are large.
When the ratios of plate length and width to separation distance are large, what size is the parasitic capacitance?
negligibly small


Input: Party leaders of the United States House of Representatives
Internal party disunity compounded the difficulty of identifying lawmakers who might have informally functioned as a minority leader. For instance, "seven of the fourteen speakership elections from 1834 through 1859 had at least twenty different candidates in the field. Thirty-six competed in 1839, ninety-seven in 1849, ninety-one in 1859, and 138 in 1855." With so many candidates competing for the speakership, it is not at all clear that one of the defeated lawmakers then assumed the mantle of "minority leader." The Democratic minority from 1861 to 1875 was so completely disorganized that they did not "nominate a candidate for Speaker in two of these seven Congresses and nominated no man more than once in the other five. The defeated candidates were not automatically looked to for leadership."

What made identifying House leadership difficult?
Output: Internal party disunity


Input: Article: The initial near-complete MPEG-1 standard (parts 1, 2 and 3) was publicly available on 6 December 1991 as ISO CD 11172. In most countries, patents cannot be filed after prior art has been made public, and patents expire 20 years after the initial filing date, which can be up to 12 months later for filings in other countries. As a result, patents required to implement MP3 expired in most countries by December 2012, 21 years after the publication of ISO CD 11172.

Now answer this question: When did patents required to implement MP3 expire in most countries?

Output: December 2012


Problem: A framework was developed in 1967 by Heinz Kloss, abstand and ausbau languages, to describe speech communities, that while unified politically and/or culturally, include multiple dialects which though closely related genetically may be divergent to the point of inter-dialect unintelligibility.
Who developed the abstand and ausbau languages framework?
The answer is the following:
Heinz Kloss