Problem: Please answer a question about the following article about Classical music:
The theories surrounding equal temperament began to be put in wider practice, especially as it enabled a wider range of chromatic possibilities in hard-to-tune keyboard instruments. Although Bach did not use equal temperament, as a modern piano is generally tuned, changes in the temperaments from the meantone system, common at the time, to various temperaments that made modulation between all keys musically acceptable, made possible Bach's Well-Tempered Clavier.
What did Bach not use?
A: equal temperament

Question: Read this and answer the question

Comparison of a back-translation with the original text is sometimes used as a check on the accuracy of the original translation, much as the accuracy of a mathematical operation is sometimes checked by reversing the operation. But the results of such reverse-translation operations, while useful as approximate checks, are not always precisely reliable. Back-translation must in general be less accurate than back-calculation because linguistic symbols (words) are often ambiguous, whereas mathematical symbols are intentionally unequivocal.

What is sometimes used to check the accuracy of a translation?
Answer: Comparison of a back-translation with the original text

Problem: Certain bacteria form close spatial associations that are essential for their survival. One such mutualistic association, called interspecies hydrogen transfer, occurs between clusters of anaerobic bacteria that consume organic acids, such as butyric acid or propionic acid, and produce hydrogen, and methanogenic Archaea that consume hydrogen. The bacteria in this association are unable to consume the organic acids as this reaction produces hydrogen that accumulates in their surroundings. Only the intimate association with the hydrogen-consuming Archaea keeps the hydrogen concentration low enough to allow the bacteria to grow.
What helps bacteria to survive?
The answer is the following: close spatial associations

While each wrestling match is ostensibly a competition of athletics and strategy, the goal of each match from a business standpoint is to excite and entertain the audience. Although the competition is staged, dramatic emphasis can be utilized to draw out the most intense reaction from the audience. Heightened interest results in higher attendance rates, increased ticket sales, higher ratings on television broadcasts (which result in greater ad revenue), higher pay-per-view buyrates, and sales of branded merchandise and recorded video footage. All of these contribute to the profit of the promotion company.
Though the contest is staged, what can garner more interest from the crowd?
dramatic emphasis

Input: Kathmandu
The enclosed compound of the Narayanhity Palace Museum is in the north-central part of Kathmandu. "Narayanhity" comes from Narayana, a form of the Hindu god Lord Vishnu, and Hiti, meaning "water spout" (Vishnu's temple is located opposite the palace, and the water spout is located east of the main entrance to the precinct). Narayanhity was a new palace, in front of the old palace built in 1915, and was built in 1970 in the form of a contemporary Pagoda. It was built on the occasion of the marriage of King Birenda Bir Bikram Shah, then heir apparent to the throne. The southern gate of the palace is at the crossing of Prithvipath and Darbar Marg roads. The palace area covers (30 hectares (74 acres)) and is fully secured with gates on all sides. This palace was the scene of the Nepali royal massacre. After the fall of the monarchy, it was converted to a museum.

In what year was Narayanhity constructed?
Output: 1970

Problem: Please answer a question about the following article about LaserDisc:
Another significant issue unique to LaserDisc is one involving the inconsistency of playback quality between different makers and models of player. On most televisions, a given DVD player will produce a picture that is visually indistinguishable from other units. Differences in image quality between players only becomes easily apparent on large televisions and substantial leaps in image quality are generally only obtained with expensive, high-end players that allow for post-processing of the MPEG-2 stream during playback. In contrast, LaserDisc playback quality is highly dependent on hardware quality. Major variances in picture quality appear between different makers and models of LD players, even when tested on a low to mid-range television. The obvious benefits of using high quality equipment has helped keep demand for some players high, thus also keeping pricing for those units comparably high. In the 1990s, notable players sold for anywhere from US$200 to well over $1,000, while older and less desirable players could be purchased in working condition for as little as $25.
Is LaserDisc quality consistent or inconsistent between player brands?
A:
inconsistency