Article: These processes are also important in biological responses to pollution; for example, sulfate-reducing bacteria are largely responsible for the production of the highly toxic forms of mercury (methyl- and dimethylmercury) in the environment. Non-respiratory anaerobes use fermentation to generate energy and reducing power, secreting metabolic by-products (such as ethanol in brewing) as waste. Facultative anaerobes can switch between fermentation and different terminal electron acceptors depending on the environmental conditions in which they find themselves.

Question: What is the by-product of non-repiratory anaerobes?
Ans: ethanol

Article: The Air Commerce Act of May 20, 1926, is the cornerstone of the federal government's regulation of civil aviation. This landmark legislation was passed at the urging of the aviation industry, whose leaders believed the airplane could not reach its full commercial potential without federal action to improve and maintain safety standards. The Act charged the Secretary of Commerce with fostering air commerce, issuing and enforcing air traffic rules, licensing pilots, certifying aircraft, establishing airways, and operating and maintaining aids to air navigation. The newly created Aeronautics Branch, operating under the Department of Commerce assumed primary responsibility for aviation oversight.

Question: Who was responsible for operating and maintaining aids to air navigation?
Ans: Secretary of Commerce

Article: Most French rulers since the Middle Ages made a point of leaving their mark on a city that, contrary to many other of the world's capitals, has never been destroyed by catastrophe or war. In modernising its infrastructure through the centuries, Paris has preserved even its earliest history in its street map.[citation needed] At its origin, before the Middle Ages, the city was composed around several islands and sandbanks in a bend of the Seine; of those, two remain today: the ile Saint-Louis, the ile de la Cite; a third one is the 1827 artificially created ile aux Cygnes. Modern Paris owes much to its late 19th century Second Empire remodelling by the Baron Haussmann: many of modern Paris' busiest streets, avenues and boulevards today are a result of that city renovation. Paris also owes its style to its aligned street-fronts, distinctive cream-grey "Paris stone" building ornamentation, aligned top-floor balconies, and tree-lined boulevards. The high residential population of its city centre makes it much different from most other western global cities.

Question: When was ile aux Cygnes created?
Ans: 1827

Article: Several annual eventsmany of them centered on performing and visual artsdraw visitors to Ann Arbor. One such event is the Ann Arbor Art Fairs, a set of four concurrent juried fairs held on downtown streets. Scheduled on Wednesday through Saturday of the third week of July, the fairs draw upward of half a million visitors. Another is the Ann Arbor Film Festival, held during the third week of March, which receives more than 2,500 submissions annually from more than 40 countries and serves as one of a handful of Academy Awardqualifying festivals in the United States.

Question: What is the name of the film festival held at Ann Arbor?
Ans:
Ann Arbor Film Festival