The problem: Answer a question about this article:
United States of America: The torch relay's North American leg occurred in San Francisco, California on April 9. On the day of the relay officials diverted the torch run to an unannounced route. The start was at McCovey Cove, where Norman Bellingham of the U.S. Olympic Committee gave the torch to the first torchbearer, Chinese 1992 Olympic champion swimmer Lin Li. The planned closing ceremony at Justin Herman Plaza was cancelled and instead, a ceremony was held at San Francisco International Airport, where the torch was to leave for Buenos Aires. The route changes allowed the run to avoid large numbers of China supporters and protesters against China. As people found out there would be no closing ceremony at Justin Herman Plaza, there were angry reactions. One demonstrator was quoted as saying that the route changes were an effort to "thwart any organized protest that had been planned." San Francisco Board of Supervisors President Aaron Peskin, a critic of Mayor Gavin Newsom, said that it was a "cynical plan to please the Bush State Department and the Chinese government because of the incredible influence of money." Newsom, on the other hand, said he felt it was in "everyone's best interest" and that he believed people had been "afforded the right to protest and support the torch" despite the route changes. Peter Ueberroth, head of the U.S. Olympic Committee, praised the route changes, saying, "The city of San Francisco, from a global perspective, will be applauded." People who saw the torch were surprised and cheered as shown from live video of CBS and NBC. The cost to the city for hosting the event was reported to be USD $726,400, nearly half of which has been recovered by private fundraising. Mayor Gavin Newsom said that "exponential" costs associated with mass arrests were avoided by his decision to change the route in consultation with police chief Heather Fong.
What day did the torch arrive in San Francisco?
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The answer: April 9

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In addressing the question of who invented the incandescent lamp, historians Robert Friedel and Paul Israel list 22 inventors of incandescent lamps prior to Joseph Swan and Thomas Edison. They conclude that Edison's version was able to outstrip the others because of a combination of three factors: an effective incandescent material, a higher vacuum than others were able to achieve (by use of the Sprengel pump) and a high resistance that made power distribution from a centralized source economically viable.
How did Edison achieve a higher vacuum than other inventors?
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The answer: by use of the Sprengel pump

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In some team matches, only one entrant from each team may be designated as the "legal" or "active" wrestler at any given moment. Two wrestlers must make physical contact (typically palm-to-palm) in order to transfer this legal status. This is known as a "tag", with the participants "tagging out" and "tagging in". Typically the wrestler who is tagging out has a 5-second count to leave the ring, whereas the one tagging in can enter the ring at any time, resulting in heels legally double-teaming a face.
What are two things that can be done with tagging?
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The answer: "tagging out" and "tagging in".

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The Central African Republic (CAR; Sango: Kodorosese ti Beafrika; French: Republique centrafricaine pronounced: [epyblik stafikn], or Centrafrique [stafik]) is a landlocked country in Central Africa. It is bordered by Chad to the north, Sudan to the northeast, South Sudan to the east, the Democratic Republic of the Congo and the Republic of the Congo to the south and Cameroon to the west. The CAR covers a land area of about 620,000 square kilometres (240,000 sq mi) and had an estimated population of around 4.7 million as of 2014[update].
What is the population of CAR approximately?
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The answer:
4.7 million