The problem: Answer a question about this article:
The most dense rail network in Europe of 5,063 km (3,146 mi) carries over 350 million passengers annually. In 2007, each Swiss citizen travelled on average 2,258 km (1,403 mi) by rail, which makes them the keenest rail users. The network is administered mainly by the Federal Railways, except in Graubünden, where the 366 km (227 mi) narrow gauge railway is operated by the Rhaetian Railways and includes some World Heritage lines. The building of new railway base tunnels through the Alps is under way to reduce the time of travel between north and south through the AlpTransit project.
What is the Alp-Transit project designed to reduce the time of travel between?
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The answer: north and south


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In its early years Universal released three brands of feature films — Red Feather, low-budget programmers; Bluebird, more ambitious productions; and Jewel, their prestige motion pictures. Directors included Jack Conway, John Ford, Rex Ingram, Robert Z. Leonard, George Marshall and Lois Weber, one of the few women directing films in Hollywood.:13
What type of movies came out of Bluebird?
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The answer: more ambitious productions


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In 1526, Babur, a Timurid descendant of Timur and Genghis Khan from Fergana Valley (modern day Uzbekistan), swept across the Khyber Pass and established the Mughal Empire, which at its zenith covered modern day Afghanistan, Pakistan, India and Bangladesh. However, his son Humayun was defeated by the Afghan warrior Sher Shah Suri in the year 1540, and Humayun was forced to retreat to Kabul. After Sher Shah's death, his son Islam Shah Suri and the Hindu emperor Hemu Vikramaditya, who had won 22 battles against Afghan rebels and forces of Akbar, from Punjab to Bengal and had established a secular rule in North India from Delhi till 1556 after winning Battle of Delhi. Akbar's forces defeated and killed Hemu in the Second Battle of Panipat on 6 November 1556.
By what route did Babur enter India?
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The answer: Khyber Pass


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Hyderabad's lakes and the sloping terrain of its low-lying hills provide habitat for an assortment of flora and fauna. The forest region in and around the city encompasses areas of ecological and biological importance, which are preserved in the form of national parks, zoos, mini-zoos and a wildlife sanctuary. Nehru Zoological Park, the city's one large zoo, is the first in India to have a lion and tiger safari park. Hyderabad has three national parks (Mrugavani National Park, Mahavir Harina Vanasthali National Park and Kasu Brahmananda Reddy National Park), and the Manjira Wildlife Sanctuary is about 50 km (31 mi) from the city. Hyderabad's other environmental reserves are: Kotla Vijayabhaskara Reddy Botanical Gardens, Shamirpet Lake, Hussain Sagar, Fox Sagar Lake, Mir Alam Tank and Patancheru Lake, which is home to regional birds and attracts seasonal migratory birds from different parts of the world. Organisations engaged in environmental and wildlife preservation include the Telangana Forest Department, Indian Council of Forestry Research and Education, the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), the Animal Welfare Board of India, the Blue Cross of Hyderabad and the University of Hyderabad.
Which environmental preserve in Hyderabad is known to be a home for migratory birds?
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The answer:
Patancheru Lake