Problem: New York City:

The annual United States Open Tennis Championships is one of the world's four Grand Slam tennis tournaments and is held at the National Tennis Center in Flushing Meadows-Corona Park, Queens. The New York Marathon is one of the world's largest, and the 2004–2006 events hold the top three places in the marathons with the largest number of finishers, including 37,866 finishers in 2006. The Millrose Games is an annual track and field meet whose featured event is the Wanamaker Mile. Boxing is also a prominent part of the city's sporting scene, with events like the Amateur Boxing Golden Gloves being held at Madison Square Garden each year. The city is also considered the host of the Belmont Stakes, the last, longest and oldest of horse racing's Triple Crown races, held just over the city's border at Belmont Park on the first or second Sunday of June. The city also hosted the 1932 U.S. Open golf tournament and the 1930 and 1939 PGA Championships, and has been host city for both events several times, most notably for nearby Winged Foot Golf Club.

In what borough is the National Tennis Center located?
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A: Queens


Problem: Starting in 1940 (18 months before Pearl Harbor), the nation mobilized, giving high priority to air power. American involvement in World War II in 1940–41 was limited to providing war material and financial support to Britain, the Soviet Union, and the Republic of China. The U.S. entered officially on 8 December 1941 following the Japanese attack on Pearl Harbor, Hawaii. Japanese forces soon seized American, Dutch, and British possessions across the Pacific and Southeast Asia, except for Australia, which became a main American forward base along with Hawaii.
 What country served as an African forward base to wage war with Japan?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Endemic species can be threatened with extinction through the process of genetic pollution, i.e. uncontrolled hybridization, introgression and genetic swamping. Genetic pollution leads to homogenization or replacement of local genomes as a result of either a numerical and/or fitness advantage of an introduced species. Hybridization and introgression are side-effects of introduction and invasion. These phenomena can be especially detrimental to rare species that come into contact with more abundant ones. The abundant species can interbreed with the rare species, swamping its gene pool. This problem is not always apparent from morphological (outward appearance) observations alone. Some degree of gene flow is normal adaptation, and not all gene and genotype constellations can be preserved. However, hybridization with or without introgression may, nevertheless, threaten a rare species' existence.
What causes genetic pollution?
A: either a numerical and/or fitness advantage of an introduced species


Context and question: Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 has the distinction of being the only naturally occurring fissile isotope. Uranium-238 is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced from natural thorium and is also important in nuclear technology. While uranium-238 has a small probability for spontaneous fission or even induced fission with fast neutrons, uranium-235 and to a lesser degree uranium-233 have a much higher fission cross-section for slow neutrons. In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction. This generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons. Depleted uranium (238U) is used in kinetic energy penetrators and armor plating.
What can't be turned into plutonium-239 in a nuclear reactor?
Answer: unanswerable


Question: There are 17 laws in the official Laws of the Game, each containing a collection of stipulation and guidelines. The same laws are designed to apply to all levels of football, although certain modifications for groups such as juniors, seniors, women and people with physical disabilities are permitted. The laws are often framed in broad terms, which allow flexibility in their application depending on the nature of the game. The Laws of the Game are published by FIFA, but are maintained by the International Football Association Board (IFAB). In addition to the seventeen laws, numerous IFAB decisions and other directives contribute to the regulation of football.
Is there an answer to this question: Who avoids the Laws of the Game?

Answer: unanswerable


Question: Moisture absorption occurs when the material is exposed to high humidity or water. Both the resin and the reinforcement may absorb water; water may be also soaked by capillary forces through voids in the materials and along the reinforcement. Epoxies of the FR-4 materials aren't too susceptible, with absorption of only 0.15%. Teflon has very low absorption of 0.01%. Polyimides and cyanate esters, on the other side, suffer from high water absorption. Absorbed water can lead to significant degradation of key parameters; it impairs tracking resistance, breakdown voltage, and dielectric parameters. Relative dielectric constant of water is about 73, compared to about 4 for common circuitboard materials. Absorbed moisture can also vaporize on heating and cause cracking and delamination, the same effect responsible for "popcorning" damage on wet packaging of electronic parts. Careful baking of the substrates may be required.
Is there an answer to this question: What percentage absorption do F-4 epoxies have?

Answer:
0.15%