Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

Q: Paragraph- Sent 1: Breathing is the process of moving air into and out of the lungs.
Sent 2: The process depends on a muscle called the diaphragm.
Sent 3: This is a large, sheet-like muscle below the lungs.
Sent 4: Inhaling, or breathing in, occurs when the diaphragm muscle tightens.
Sent 5: This increases the size of the chest.
Sent 6: This too decreases air pressure inside the lungs.
Sent 7: This action allows air and gases to enter the lungs.
Sent 8: Exhaling, or breathing out, occurs when the diaphragm muscle relaxes.
Sent 9: This decreases the size of the chest.
Sent 10: This increases air pressure inside the lungs.
Sent 11: This action allows for air to leave the lungs.
Sent 12: When you inhale, air enters the respiratory system through your nose and ends up in your lungs, where gas exchange with the blood takes place.
Sent 13: What happens to the air along the way?
Sent 14: In the nose, mucus and hairs trap any dust or other particles in the air.
Sent 15: The air is also warmed and moistened.
Sent 16: Next, air passes through a passageway that is connected to the windpipe.
Sent 17: The air then finds its way to the lungs.
Sent 18: In the chest, the windpipe splits so that air enters both the right and left lung.
Question: How does air leave our lungs?.

A: Exhaling.
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Q: Paragraph- Sent 1: We do not know exactly how the hijackers gained access to the cockpit; FAA rules required that the doors remain closed and locked during flight.
Sent 2: Ong speculated that they had "jammed their way" in.
Sent 3: Perhaps the terrorists stabbed the flight attendants to get a cockpit key, to force one of them to open the cockpit door, or to lure the captain or first officer out of the cockpit.
Sent 4: Or the flight attendants may just have been in their way.
Sent 5: At the same time or shortly thereafter, Atta-the only terrorist on board trained to fly a jet-would have moved to the cockpit from his business-class seat, possibly accompanied by Omari.
Sent 6: As this was happening, passenger Daniel Lewin, who was seated in the row just behind Atta and Omari, was stabbed by one of the hijackers-probably Satam al Suqami, who was seated directly behind Lewin.
Sent 7: Lewin had served four years as an officer in the Israeli military.
Sent 8: He may have made an attempt to stop the hijackers in front of him, not realizing that another was sitting behind him.
Sent 9: The hijackers quickly gained control and sprayed Mace, pepper spray, or some other irritant in the first-class cabin, in order to force the passengers and flight attendants toward the rear of the plane.
Sent 10: They claimed they had a bomb.
Sent 11: About five minutes after the hijacking began, Betty Ong contacted the American Airlines Southeastern Reservations Office in Cary, North Carolina, via an AT&T airphone to report an emergency aboard the flight.
Sent 12: This was the first of several occasions on 9/11 when flight attendants took action outside the scope of their training, which emphasized that in a hijacking, they were to communicate with the cockpit crew.
Sent 13: The emergency call lasted approximately 25 minutes, as Ong calmly and professionally relayed information about events taking place aboard the airplane to authorities on the ground.
Sent 14: At 8:19, Ong reported:"The cockpit is not answering, somebody's stabbed in business class-and I think there's Mace-that we can't breathe-I don't know, I think we're getting hijacked."Sent 15: She then told of the stabbings of the two flight attendants.
Sent 16: At 8:21, one of the American employees receiving Ong's call in North Carolina, Nydia Gonzalez, alerted the American Airlines operations center in Fort Worth, Texas, reaching Craig Marquis, the manager on duty.
Sent 17: Marquis soon realized this was an emergency and instructed the airline's dispatcher responsible for the flight to contact the cockpit.
Sent 18: At 8:23, the dispatcher tried unsuccessfully to contact the aircraft.
Question: How many people were stabbed on the flight?.

A: Three.
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Q: Paragraph- Sent 1: Maximilian's death came at a time when Durer was concerned he was losing "my sight and freedom of hand" (perhaps caused by arthritis) and increasingly affected by the writings of Martin Luther.
Sent 2: In July 1520 Durer made his fourth and last major journey, to renew the Imperial pension Maximilian had given him and to secure the patronage of the new emperor, Charles V, who was to be crowned at Aachen.
Sent 3: Durer journeyed with his wife and her maid via the Rhine to Cologne and then to Antwerp, where he was well received and produced numerous drawings in silverpoint, chalk and charcoal.
Sent 4: In addition to going to the coronation, he made excursions to Cologne (where he admired the painting of Stefan Lochner), Nijmegen, 's-Hertogenbosch, Bruges (where he saw Michelangelo's Madonna of Bruges), Ghent (where he admired van Eyck's altarpiece), and Zeeland.
Sent 5: Durer took a large stock of prints with him and wrote in his diary to whom he gave, exchanged or sold them, and for how much.
Sent 6: This provides rare information of the monetary value placed on prints at this time.
Sent 7: Unlike paintings, their sale was very rarely documented.
Sent 8: While providing valuable documentary evidence, Durer's Netherlandish diary also reveals that the trip was not a profitable one.
Sent 9: For example, Durer offered his last portrait of Maximilian to his daughter, Margaret of Austria, but eventually traded the picture for some white cloth after Margaret disliked the portrait and declined to accept it.
Sent 10: During this trip he also met Bernard van Orley, Jan Provoost, Gerard Horenbout, Jean Mone, Joachim Patinir and Tommaso Vincidor, though he did not, it seems, meet Quentin Matsys.
Sent 11: At the request of Christian II of Denmark, Durer went to Brussels to paint the King's portrait.
Sent 12: There he saw "The things which have been sent to the king from the golden land"--the Aztec treasure that Hernan Cortes had sent home to Holy Roman Emperor Charles V following the fall of Mexico.
Sent 13: Durer wrote that this treasure "was much more beautiful to me than miracles.
Sent 14: These things are so precious that they have been valued at 100,000 florins".
Sent 15: Durer also appears to have been collecting for his own cabinet of curiosities, and he sent back to Nuremberg various animal horns, a piece of coral, some large fish fins, and a wooden weapon from the East Indies.
Sent 16: Having secured his pension, Durer finally returned home in July 1521, having caught an undetermined illness--perhaps malaria --which afflicted him for the rest of his life, and greatly reduced his rate of work.
Question: Why did Durer set out on the journey?.

A:
To renew the Imperial pension Maximilian had given him and to secure the patronage of the new emperor, Charles V, who was to be crowned at Aachen.
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