You need to read the given passage and construct a question about the information present in the passage. The question should be answerable from the passage. Most importantly, only those questions are allowed whose answers cannot be determined from a single sentence. Do not generate questions that require only a single sentence to answer. Instead, try to combine two sentences and create a question from that combination. Do not create open-ended questions, i.e., the answers to them cannot be found precisely from the information provided in the passage.

Input: Consider Input: 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.

Output: Who relayed the information to the American Airlines Southeastern Reservations Office, that two flight attendants had been stabbed?


Input: Consider Input: Paragraph- Sent 1: WASHINGTON (CNN) -- The U.S. Food and Drug Administration announced Wednesday that laboratory tests on popular smoking devices known as electronic cigarettes have found they contain carcinogens and other toxic chemicals dangerous to humans.
Sent 2: E-cigarettes are battery-operated and contain cartridges filled with nicotine and other chemicals.
Sent 3: Known as "e-cigarettes," the devices are battery-operated and contain cartridges filled with nicotine and other chemicals, spiced with flavors such as chocolate, cola or bubble gum.
Sent 4: While manufacturers tout e-cigarettes as a "healthy way" to smoke, federal health officials say the devices turn nicotine, which is highly addictive, and other chemicals into a vapor that is inhaled by the user.
Sent 5: "The FDA is concerned about the safety of these products and how they are marketed to the public," said Dr. Margaret A. Hamburg, commissioner of the FDA.
Sent 6: CNN contacted Florida-based Smoking Everywhere, one of the largest manufacturers of e-cigarettes, after the FDA announcement, and a spokeswoman said the company had no comment.
Sent 7: Because e-cigarettes have not been submitted to the FDA for evaluation or approval, the agency had no way of knowing the levels of nicotine or the amounts or kinds of other chemicals that the various brands of these products deliver to the user.
Sent 8: That is why the FDA began to test them.
Sent 9: The FDA's Division of Pharmaceutical Analysis analyzed the ingredients in a small sample of cartridges from two leading brands of e-cigarettes.
Sent 10: In releasing its information, the FDA did not identify the two companies, but said in one sample, diethylene glycol -- a chemical used in antifreeze that is toxic to humans -- was detected.
Sent 11: Other samples detected carcinogens that are dangerous to those who smoke them, the FDA said.
Sent 12: The FDA has been examining and seizing shipments of non-U.S.-made e-cigarettes at the U.S. border since summer 2008.
Sent 13: To date, 50 shipments have been stopped.
Sent 14: The products examined thus far meet the definition of a combination drug-device product under the Federal Food, Drug, and Cosmetic Act.
Sent 15: "We know very little about these devices, said Dr. Jonathan Samet, director of the Institute for Global Health at the University of Southern California, "but to say they are healthy -- that's highly doubtful.".

Output: Why is te FDA concerned about the e cigarettes?


Input: Consider Input: Paragraph- Sent 1: From Babylon, Alexander went to Susa, one of the Achaemenid capitals, and captured its legendary treasury.
Sent 2: He sent the bulk of his army to the Persian ceremonial capital of Persepolis via the Royal Road.
Sent 3: Alexander himself took selected troops on the direct route to the city.
Sent 4: He had to storm the pass of the Persian Gates (in the modern Zagros Mountains) which had been blocked by a Persian army under Ariobarzanes and then hurried to Persepolis before its garrison could loot the treasury.
Sent 5: On entering Persepolis, Alexander allowed his troops to loot the city for several days.
Sent 6: Alexander stayed in Persepolis for five months.
Sent 7: During his stay a fire broke out in the eastern palace of Xerxes and spread to the rest of the city.
Sent 8: Possible causes include a drunken accident or deliberate revenge for the burning of the Acropolis of Athens during the Second Persian War.


Output: What happened with Persepolis at the time of Alexander's stay and what caused this event?


