Here is a question about this article: Ion gauges are used in ultrahigh vacuum. They come in two types: hot cathode and cold cathode. In the hot cathode version an electrically heated filament produces an electron beam. The electrons travel through the gauge and ionize gas molecules around them. The resulting ions are collected at a negative electrode. The current depends on the number of ions, which depends on the pressure in the gauge. Hot cathode gauges are accurate from 103 torr to 1010 torr. The principle behind cold cathode version is the same, except that electrons are produced in a discharge created by a high voltage electrical discharge. Cold cathode gauges are accurate from 102 torr to 109 torr. Ionization gauge calibration is very sensitive to construction geometry, chemical composition of gases being measured, corrosion and surface deposits. Their calibration can be invalidated by activation at atmospheric pressure or low vacuum. The composition of gases at high vacuums will usually be unpredictable, so a mass spectrometer must be used in conjunction with the ionization gauge for accurate measurement.
What is the answer to this question: Why does a mass spectrometer need to be used with gauge to be accurate at high vacuum gas measurement?
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So... composition of gases at high vacuums will usually be unpredictable

The problem: Answer a question about this article:
On 28 April 2015, the Iranian navy seized the Marshall Island-flagged MV Maersk Tigris near the Strait of Hormuz. The ship had been chartered by Germany's Rickmers Ship Management, which stated that the ship contained no special cargo and no military weapons. The ship was reported to be under the control of the Iranian Revolutionary Guard according to the Pentagon. Tensions escallated in the region due to the intensifying of Saudi-led coalition attacks in Yemen. The Pentagon reported that the destroyer USS Farragut and a maritime reconnaissance aircraft were dispatched upon receiving a distress call from the ship Tigris and it was also reported that all 34 crew members were detained. US defense officials have said that they would review U.S. defense obligations to the Government of the Marshall Islands in the wake of recent events and also condemned the shots fired at the bridge as "inappropriate". It was reported in May 2015 that Tehran would release the ship after it paid a penalty.
How many crew members were on the MV Maersk Tigris?
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The answer: 34

Problem: Please answer a question about the following article about Guinea-Bissau:
The calabash is the primary musical instrument of Guinea-Bissau, and is used in extremely swift and rhythmically complex dance music. Lyrics are almost always in Guinea-Bissau Creole, a Portuguese-based creole language, and are often humorous and topical, revolving around current events and controversies, especially AIDS.
What do typical song lyrics revolve around?
A: current events and controversies

Question: Read this and answer the question

Electricity in the Richmond Metro area is provided by Dominion Virginia Power. The company, based in Richmond, is one of the nation's largest producers of energy, serving retail energy customers in nine states. Electricity is provided in the Richmond area primarily by the North Anna Nuclear Generating Station and Surry Nuclear Generating Station, as well as a coal-fired station in Chester, Virginia. These three plants provide a total of 4,453 megawatts of power. Several other natural gas plants provide extra power during times of peak demand. These include facilities in Chester, and Surry, and two plants in Richmond (Gravel Neck and Darbytown).

In what town is a coal-fired plant that provides power to Richmond located?
Answer: Chester

Problem: In 2001, Comcast announced it would acquire the assets of the largest cable television operator at the time, AT&T Broadband, for US$44.5 billion. The proposed name for the merged company was "AT&T Comcast", but the companies ultimately decided to keep only the Comcast name. In 2002, Comcast acquired all assets of AT&T Broadband, thus making Comcast the largest cable television company in the United States with over 22 million subscribers. This also spurred the start of Comcast Advertising Sales (using AT&T's groundwork) which would later be renamed Comcast Spotlight. As part of this acquisition, Comcast also acquired the National Digital Television Center in Centennial, Colorado as a wholly owned subsidiary, which is today known as the Comcast Media Center.
When did Comcast acquire the cable assets of AT&T Broadband?
The answer is the following: 2001

Input: Article: During the post-World War I period ski-lifts were built in Swiss and Austrian towns to accommodate winter visitors, but summer tourism continued to be important; by the mid-20th century the popularity of downhill skiing increased greatly as it became more accessible and in the 1970s several new villages were built in France devoted almost exclusively to skiing, such as Les Menuires. Until this point Austria and Switzerland had been the traditional and more popular destinations for winter sports, but by the end of the 20th century and into the early 21st century, France, Italy and the Tyrol began to see increases in winter visitors. From 1980 to the present, ski-lifts have been modernized and snow-making machines installed at many resorts, leading to concerns regarding the loss of traditional Alpine culture and questions regarding sustainable development as the winter ski industry continues to develop quickly and the number of summer tourists decline.

Now answer this question: When were ski-lifts built in Swiss and Austrian towns?

Output:
post-World War I