[Q]: Question: "Establishing airways is just one of the responsibilites of what government entity that was created in 1926?" Context: "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." Answer:
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[A]: Aeronautics Branch

[Q]: Question: "The Grounds held the festival since and until when?" Context: "The tradition of Estonian Song Festivals (Laulupidu) started at the height of the Estonian national awakening in 1869. Today, it is one of the largest amateur choral events in the world. In 2004, about 100,000 people participated in the Song Festival. Since 1928, the Tallinn Song Festival Grounds (Lauluvaljak) have hosted the event every five years in July. The last festival took place in July 2014. In addition, Youth Song Festivals are also held every four or five years, the last of them in 2011, and the next is scheduled for 2017." Answer:
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[A]: Since 1928, the Tallinn Song Festival Grounds (Lauluvaljak) have hosted the event every five years in July. The last festival took place in July 2014

[Q]: Question: "What is a good area to find wild foods?" Context: "Many groups continued their hunter-gatherer ways of life, although their numbers have continually declined, partly as a result of pressure from growing agricultural and pastoral communities. Many of them reside in the developing world, either in arid regions or tropical forests. Areas that were formerly available to hunter-gatherers wereand continue to beencroached upon by the settlements of agriculturalists. In the resulting competition for land use, hunter-gatherer societies either adopted these practices or moved to other areas. In addition, Jared Diamond has blamed a decline in the availability of wild foods, particularly animal resources. In North and South America, for example, most large mammal species had gone extinct by the end of the Pleistoceneaccording to Diamond, because of overexploitation by humans, although the overkill hypothesis he advocates is strongly contested.[by whom?]" Answer:
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[A]: arid regions or tropical forests

[Q]: Question: "Which city, according to the article, has the second-busiest subway lines in the world?" Context: "Mexico City is served by the Sistema de Transporte Colectivo, a 225.9 km (140 mi) metro system, which is the largest in Latin America. The first portions were opened in 1969 and it has expanded to 12 lines with 195 stations. The metro is one of the busiest in the world transporting approximately 4.5 million people every day, surpassed only by subway lines in Moscow (7.5 million), Tokyo (5.9 million), and New York City (5.1 million). It is heavily subsidized, and has some of the lowest fares in the world, each trip costing 5.00 pesos from 05:00 am to midnight. Several stations display pre-Columbian artifacts and architecture that were discovered during the metro's construction.[citation needed] However, the metro covers less than half of the total urban area. The Metro stations are also differentiated by the use of icons and glyphs which were proposed for people who could not read. The specific icons were developed based on historical (characters, sites, pre-Hispanic motifs), linguistic, symbolic (glyphs) or location references and has being emulated in further transportations alternatives in the City and in other Mexican cities. Mexico City is the only city in the world to use the icon reference and has become a popular culture trademark for the city." Answer:
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[A]:
Tokyo