The problem: Answer a question about this article:
The Chicago Transit Authority's elevated train running through Evanston is called the Purple Line, taking its name from Northwestern's school color. The Foster and Davis stations are within walking distance of the southern end of the campus, while the Noyes station is close to the northern end of the campus. The Central station is close to Ryan Field, Northwestern's football stadium. The Evanston Davis Street Metra station serves the Northwestern campus in downtown Evanston and the Evanston Central Street Metra station is near Ryan Field. Pace Suburban Bus Service and the CTA have several bus routes that run through or near the Evanston campus.
What is the name of the Chicago Transit Authority's elevated train through Evanston?
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The answer: the Purple Line


The problem: Answer a question about this article:
Since the 16th century, the city has had a bear pit, the Bärengraben, at the far end of the Nydeggbrücke to house its heraldic animals. The currently four bears are now kept in an open-air enclosure nearby, and two other young bears, a present by the Russian president, are kept in Dählhölzli zoo.
What are held at the Barengraben?
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The answer: heraldic animals


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Rapid decompression can be much more dangerous than vacuum exposure itself. Even if the victim does not hold his or her breath, venting through the windpipe may be too slow to prevent the fatal rupture of the delicate alveoli of the lungs. Eardrums and sinuses may be ruptured by rapid decompression, soft tissues may bruise and seep blood, and the stress of shock will accelerate oxygen consumption leading to hypoxia. Injuries caused by rapid decompression are called barotrauma. A pressure drop of 13 kPa (100 Torr), which produces no symptoms if it is gradual, may be fatal if it occurs suddenly.
What does acceleration of oxygen consumption do?
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The answer: hypoxia


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Although STOVL aircraft are capable of taking off vertically from a spot on the deck, using the ramp and a running start is far more fuel efficient and permits a heavier launch weight. As catapults are unnecessary, carriers with this arrangement reduce weight, complexity, and space needed for complex steam or electromagnetic launching equipment, vertical landing aircraft also remove the need for arresting cables and related hardware. Russian, Chinese, and future Indian carriers include a ski-jump ramp for launching lightly loaded conventional fighter aircraft but recover using traditional carrier arresting cables and a tailhook on their aircraft.
What do Russian carriers still use to recover?
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The answer:
traditional carrier arresting cables and a tailhook on their aircraft