Here is a question about this article: The modern concept of an abstract group developed out of several fields of mathematics. The original motivation for group theory was the quest for solutions of polynomial equations of degree higher than 4. The 19th-century French mathematician Evariste Galois, extending prior work of Paolo Ruffini and Joseph-Louis Lagrange, gave a criterion for the solvability of a particular polynomial equation in terms of the symmetry group of its roots (solutions). The elements of such a Galois group correspond to certain permutations of the roots. At first, Galois' ideas were rejected by his contemporaries, and published only posthumously. More general permutation groups were investigated in particular by Augustin Louis Cauchy. Arthur Cayley's On the theory of groups, as depending on the symbolic equation n = 1 (1854) gives the first abstract definition of a finite group.
What is the answer to this question: Who developed a theory giving the first abstract definition of a finite group?
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So... Arthur Cayley

The problem: Answer a question about this article:
Bitumen was used in early photographic technology. In 1826 or 1827, it was used by French scientist Joseph Nicephore Niepce to make the oldest surviving photograph from nature. The bitumen was thinly coated onto a pewter plate which was then exposed in a camera. Exposure to light hardened the bitumen and made it insoluble, so that when it was subsequently rinsed with a solvent only the sufficiently light-struck areas remained. Many hours of exposure in the camera were required, making bitumen impractical for ordinary photography, but from the 1850s to the 1920s it was in common use as a photoresist in the production of printing plates for various photomechanical printing processes.[not in citation given]
What feature of bitumen use in photography made it impractical?
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The answer: hours of exposure

Problem: Please answer a question about the following article about Elevator:
A freight elevator, or goods lift, is an elevator designed to carry goods, rather than passengers. Freight elevators are generally required to display a written notice in the car that the use by passengers is prohibited (though not necessarily illegal), though certain freight elevators allow dual use through the use of an inconspicuous riser. In order for an elevator to be legal to carry passengers in some jurisdictions it must have a solid inner door. Freight elevators are typically larger and capable of carrying heavier loads than a passenger elevator, generally from 2,300 to 4,500 kg. Freight elevators may have manually operated doors, and often have rugged interior finishes to prevent damage while loading and unloading. Although hydraulic freight elevators exist, electric elevators are more energy efficient for the work of freight lifting.[citation needed]
Some freight elevators allow transport of both freight and passengers by using what?
A: an inconspicuous riser

Question: Read this and answer the question

In contrast, Botswana has recently been forced to ban trophy hunting following a precipitous wildlife decline. The numbers of antelope plummeted across Botswana, with a resultant decline in predator numbers, while elephant numbers remained stable and hippopotamus numbers rose. According to the government of Botswana, trophy hunting is at least partly to blame for this, but many other factors, such as poaching, drought and habitat loss are also to blame. Uganda recently did the same, arguing that "the share of benefits of sport hunting were lopsided and unlikely to deter poaching or improve [Uganda's] capacity to manage the wildlife reserves."

What other African country has also recently banned trophy hunting?
Answer: Uganda

Problem: The Ricketts family acquired a majority interest in the Cubs in 2009, ending the Tribune years. Apparently handcuffed by the Tribune's bankruptcy and the sale of the club to the Ricketts family, the Cubs' quest for a NL Central 3-peat started with notice that there would be less invested into contracts than in previous years. Chicago engaged St. Louis in a see-saw battle for first place into August 2009, but the Cardinals played to a torrid 206 pace that month, designating their rivals to battle in the Wild Card race, from which they were eliminated in the season's final week. The Cubs were plagued by injuries in 2009, and were only able to field their Opening Day starting lineup three times the entire season. Third baseman Aramis Ramirez injured his throwing shoulder in an early May game against the Milwaukee Brewers, sidelining him until early July and forcing journeyman players like Mike Fontenot and Aaron Miles into more prominent roles. Additionally, key players like Derrek Lee (who still managed to hit .306 with 35 HR and 111 RBI that season), Alfonso Soriano and Geovany Soto also nursed nagging injuries. The Cubs posted a winning record (8378) for the third consecutive season, the first time the club had done so since 1972, and a new era of ownership under the Ricketts' family was approved by MLB owners in early October.
Who did Chicago engage in a see-saw battle for first place into August 2009?
The answer is the following: St. Louis

Input: Article: Vacuum is useful in a variety of processes and devices. Its first widespread use was in the incandescent light bulb to protect the filament from chemical degradation. The chemical inertness produced by a vacuum is also useful for electron beam welding, cold welding, vacuum packing and vacuum frying. Ultra-high vacuum is used in the study of atomically clean substrates, as only a very good vacuum preserves atomic-scale clean surfaces for a reasonably long time (on the order of minutes to days). High to ultra-high vacuum removes the obstruction of air, allowing particle beams to deposit or remove materials without contamination. This is the principle behind chemical vapor deposition, physical vapor deposition, and dry etching which are essential to the fabrication of semiconductors and optical coatings, and to surface science. The reduction of convection provides the thermal insulation of thermos bottles. Deep vacuum lowers the boiling point of liquids and promotes low temperature outgassing which is used in freeze drying, adhesive preparation, distillation, metallurgy, and process purging. The electrical properties of vacuum make electron microscopes and vacuum tubes possible, including cathode ray tubes. The elimination of air friction is useful for flywheel energy storage and ultracentrifuges.

Now answer this question: What is produced by a vacuum and used in electron beam welding and vacuum frying?

Output:
chemical inertness