Problem: Aircraft carrier:

The constraints of constructing a flight deck affect the role of a given carrier strongly, as they influence the weight, type, and configuration of the aircraft that may be launched. For example, assisted launch mechanisms are used primarily for heavy aircraft, especially those loaded with air-to-ground weapons. CATOBAR is most commonly used on USN supercarriers as it allows the deployment of heavy jets with full loadouts, especially on ground-attack missions. STOVL is used by other navies because it is cheaper to operate and still provides good deployment capability for fighter aircraft.

Why is STOVL not used by other navies?
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A: unanswerable

Problem: The show had originally planned on having four judges following the Pop Idol format; however, only three judges had been found by the time of the audition round in the first season, namely Randy Jackson, Paula Abdul and Simon Cowell. A fourth judge, radio DJ Stryker, was originally chosen but he dropped out citing "image concerns". In the second season, New York radio personality Angie Martinez had been hired as a fourth judge but withdrew only after a few days of auditions due to not being comfortable with giving out criticism. The show decided to continue with the three judges format until season eight. All three original judges stayed on the judging panel for eight seasons.
When did American Idol change to a four-judge panel?
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Answer: season eight

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Von Neumann was the first to establish a rigorous mathematical framework for quantum mechanics, known as the Diracvon Neumann axioms, with his 1932 work Mathematical Foundations of Quantum Mechanics. After having completed the axiomatization of set theory, he began to confront the axiomatization of quantum mechanics. He realized, in 1926, that a state of a quantum system could be represented by a point in a (complex) Hilbert space that, in general, could be infinite-dimensional even for a single particle. In this formalism of quantum mechanics, observable quantities such as position or momentum are represented as linear operators acting on the Hilbert space associated with the quantum system.
What paper did von Neumann produce in 1932?
A: Mathematical Foundations of Quantum Mechanics

Context and question: Distinctive and self-identified black communities have been reported in countries such as Iraq, with a reported 1.2 million black people, and they attest to a history of discrimination. African-Iraquis have sought minority status from the government, which would reserve some seats in Parliament for representatives of their population. According to Alamin M. Mazrui et al., generally in the Arabian Peninsula and neighboring countries, most of those of visible African descent are still classified and identify as Arab, not black.
Where would they be represented if minority status is granted?
Answer: Parliament

Question: Arts & Sciences at Washington University comprises three divisions: the College of Arts & Sciences, the Graduate School of Arts & Sciences, and University College in Arts & Sciences. Barbara Schaal is Dean of the Faculty of Arts & Sciences. James E. McLeod was the Vice Chancellor for Students and Dean of the College of Arts & Sciences; according to a University news release he died at the University's Barnes-Jewish Hospital on Tuesday, September 6, 2011 of renal failure as a result of a two-year-long struggle with cancer. Richard J. Smith is Dean of the Graduate School of Arts & Sciences.
Is there an answer to this question: When did James Mcleod pass away?

Answer: September 6, 2011

Question: In 2002, Spielberg was one of eight flagbearers who carried the Olympic Flag into Rice-Eccles Stadium at the Opening Ceremonies of the 2002 Winter Olympic Games in Salt Lake City. In 2006, Premiere listed him as the most powerful and influential figure in the motion picture industry. Time listed him as one of the 100 Most Important People of the Century. At the end of the 20th century, Life named him the most influential person of his generation. In 2009, Boston University presented him an honorary Doctor of Humane Letters degree.
Is there an answer to this question: How did Time Magazine recognize Spielberg?

Answer:
one of the 100 Most Important People of the Century