Film speed is used in the exposure equations to find the appropriate exposure parameters. Four variables are available to the photographer to obtain the desired effect: lighting, film speed, f-number (aperture size), and shutter speed (exposure time). The equation may be expressed as ratios, or, by taking the logarithm (base 2) of both sides, by addition, using the APEX system, in which every increment of 1 is a doubling of exposure; this increment is commonly known as a "stop". The effective f-number is proportional to the ratio between the lens focal length and aperture diameter, the diameter itself being proportional to the square root of the aperture area. Thus, a lens set to f/1.4 allows twice as much light to strike the focal plane as a lens set to f/2. Therefore, each f-number factor of the square root of two (approximately 1.4) is also a stop, so lenses are typically marked in that progression: f/1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, etc.
In the APEX system, the increment that doubles the exposure is called what?
"stop"


Input: Switzerland
Apart from the United Nations headquarters, the Swiss Confederation is host to many UN agencies, like the World Health Organization (WHO), the International Labour Organization (ILO), the International Telecommunication Union (ITU), the United Nations High Commissioner for Refugees (UNHCR) and about 200 other international organisations, including the World Trade Organization and the World Intellectual Property Organization. The annual meetings of the World Economic Forum in Davos bring together top international business and political leaders from Switzerland and foreign countries to discuss important issues facing the world, including health and the environment. Additionally the headquarters of the Bank for International Settlements (BIS) are located in Basel since 1930.

Besides the U.N. Headquarters, who hosts many U.N. agencies?
Output: Swiss Confederation


Input: Article: During the early years, MCA also manufactured discs for other companies including Paramount, Disney and Warner Bros. Some of them added their own names to the disc jacket to signify that the movie was not owned by MCA. After Discovision Associates shut down in early 1982, Universal Studio's videodisc software label, called MCA Videodisc until 1984, began reissuing many DiscoVision titles. Unfortunately, quite a few, such as Battlestar Galactica and Jaws, were time-compressed versions of their CAV or CLV Disco Vision originals. The time-compressed CLV re-issue of Jaws no longer had the original soundtrack, having had incidental background music replaced for the video disc version due to licensing cost (the music would not be available until the THX LaserDisc box set was released in 1995). One Universal/Columbia co-production issued by MCA Disco Vision in both CAV and CLV versions, The Electric Horseman, is still not available in any other home video format with its original score intact; even the most recent DVD release has had substantial music replacements of both instrumental score and Willie Nelson's songs. An MCA release of Universal's Howard the Duck, sees only the start credits shown in widescreen before changing to 4:3 for the rest of the film. For many years this was the only disc-based release of the film, until widescreen DVD formats were released with extras. Also, the LaserDisc release of E.T. the Extra-Terrestrial is the only format to include the cut scene of Harrison Ford playing the part of the school headmaster telling off Elliott for letting the frogs free in the biology class.

Now answer this question: Which film is only available with its original score in LD format , even today?

Output: The Electric Horseman


Article: Though the music varied widely between regions and artists, the post-punk movement has been characterized by its "conceptual assault" on rock conventions and rejection of aesthetics perceived of as traditionalist, hegemonic or rockist in favor of experimentation with production techniques and non-rock musical styles such as dub, electronic music, disco, noise, jazz, krautrock, world music and the avant-garde. While post-punk musicians often avoided or intentionally obscured conventional influences, previous musical styles did serve as touchstones for the movement, including particular brands of glam, art rock and "[the] dark undercurrent of '60s music".[nb 1] According to Reynolds, artists once again approached the studio as an instrument, using new recording methods and pursuing novel sonic territories. Author Matthew Bannister wrote that post-punk artists rejected the high cultural references of 1960s rock artists like the Beatles and Bob Dylan as well as paradigms that defined "rock as progressive, as art, as 'sterile' studio perfectionism ... by adopting an avant-garde aesthetic".

Question: What were the things that post-punk really got into?
Ans: experimentation with production techniques


Here is a question about this article: Many rodents such as voles live underground. Marmots live almost exclusively above the tree line as high as 2,700 m (8,858 ft). They hibernate in large groups to provide warmth, and can be found in all areas of the Alps, in large colonies they build beneath the alpine pastures. Golden eagles and bearded vultures are the largest birds to be found in the Alps; they nest high on rocky ledges and can be found at altitudes of 2,400 m (7,874 ft). The most common bird is the alpine chough which can be found scavenging at climber's huts or at the Jungfraujoch, a high altitude tourist destination.
What is the answer to this question: Where do Marmots live?
****
So... almost exclusively above the tree line as high as 2,700 m (8,858 ft)


Article: New Delhi has a population of 249,998. Hindi and Punjabi are the most widely spoken languages in New Delhi and the lingua franca of the city. English is primarily used as the formal language by business and government institutes. New Delhi has a literacy rate of 89.38% according to 2011 census, which is highest in Delhi.

Question: What is the population of New Delhi?
Ans:
249,998