In soil, microorganisms that reside in the rhizosphere (a zone that includes the root surface and the soil that adheres to the root after gentle shaking) carry out nitrogen fixation, converting nitrogen gas to nitrogenous compounds. This serves to provide an easily absorbable form of nitrogen for many plants, which cannot fix nitrogen themselves. Many other bacteria are found as symbionts in humans and other organisms. For example, the presence of over 1,000 bacterial species in the normal human gut flora of the intestines can contribute to gut immunity, synthesise vitamins, such as folic acid, vitamin K and biotin, convert sugars to lactic acid (see Lactobacillus), as well as fermenting complex undigestible carbohydrates. The presence of this gut flora also inhibits the growth of potentially pathogenic bacteria (usually through competitive exclusion) and these beneficial bacteria are consequently sold as probiotic dietary supplements.
How does gut flora prevent growth of pathogenic bacteria?
through competitive exclusion


Input: United States Army
The army employs various individual weapons to provide light firepower at short ranges. The most common weapons used by the army are the compact variant of the M16 rifle, the M4 carbine, as well as the 7.62×51mm variant of the FN SCAR for Army Rangers. The primary sidearm in the U.S. Army is the 9 mm M9 pistol; the M11 pistol is also used. Both handguns are to be replaced through the Modular Handgun System program. Soldiers are also equiped with various hand grenades, such as the M67 fragmentation grenade and M18 smoke grenade.

What is the primary sidearm used by the U.S. Army?
Output: 9 mm M9 pistol


Input: Article: Bermuda was colonised by the English as an extension of Virginia and has long had close ties with the US Atlantic Seaboard and Canadian Maritimes as well as the UK. It had a history of African slavery, although Britain abolished it decades before the US. Since the 20th century, there has been considerable immigration to Bermuda from the West Indies, as well as continued immigration from Portuguese Atlantic islands. Unlike immigrants from British colonies in the West Indies, the latter immigrants have had greater difficulty in becoming permanent residents as they lacked British citizenship, mostly spoke no English, and required renewal of work permits to remain beyond an initial period. From the 1950s onwards, Bermuda relaxed its immigration laws, allowing increased immigration from Britain and Canada. Some Black politicians accused the government of using this device to counter the West Indian immigration of previous decades.

Now answer this question: Why have these recent immigrants had trouble becoming permanent residents?

Output: they lacked British citizenship


Article: Internationally, the torch and its accompanying party traveled in a chartered Air China Airbus A330 (registered B-6075), painted in the red and yellow colors of the Olympic Games. Air China was chosen by the Beijing Committees of the Olympic Game as the designated Olympic torch carrier in March 2008 for its long-standing participation in the Olympic cause. The plane traveled a total of 137,000 km (85,000 mi) for a duration of 130 days through 21 countries and regions.

Question: How many days did the plane travel with the Torch team?
Ans: 130


Here is a question about this article: McKerrow had articulated textual criticism's goal in terms of "our ideal of an author's fair copy of his work in its final state". Bowers asserted that editions founded on Greg's method would "represent the nearest approximation in every respect of the author's final intentions." Bowers stated similarly that the editor's task is to "approximate as nearly as possible an inferential authorial fair copy." Tanselle notes that, "Textual criticism ... has generally been undertaken with a view to reconstructing, as accurately as possible, the text finally intended by the author".
What is the answer to this question: What did Bower's say about Greg's method?
****
So... represent the nearest approximation in every respect of the author's final intentions


Article: Normal functioning of the kidney, brain, liver, heart, and other systems can be affected by uranium exposure, because, besides being weakly radioactive, uranium is a toxic metal. Uranium is also a reproductive toxicant. Radiological effects are generally local because alpha radiation, the primary form of 238U decay, has a very short range, and will not penetrate skin. Uranyl (UO2+
2) ions, such as from uranium trioxide or uranyl nitrate and other hexavalent uranium compounds, have been shown to cause birth defects and immune system damage in laboratory animals. While the CDC has published one study that no human cancer has been seen as a result of exposure to natural or depleted uranium, exposure to uranium and its decay products, especially radon, are widely known and significant health threats. Exposure to strontium-90, iodine-131, and other fission products is unrelated to uranium exposure, but may result from medical procedures or exposure to spent reactor fuel or fallout from nuclear weapons. Although accidental inhalation exposure to a high concentration of uranium hexafluoride has resulted in human fatalities, those deaths were associated with the generation of highly toxic hydrofluoric acid and uranyl fluoride rather than with uranium itself. Finely divided uranium metal presents a fire hazard because uranium is pyrophoric; small grains will ignite spontaneously in air at room temperature.

Question: What is the main form of 238U decay?
Ans:
alpha radiation