Article: Whitehead and Russell had thought originally that Principia Mathematica would take a year to complete; it ended up taking them ten years. To add insult to injury, when it came time for publication, the three-volume work was so massive (more than 2,000 pages) and its audience so narrow (professional mathematicians) that it was initially published at a loss of 600 pounds, 300 of which was paid by Cambridge University Press, 200 by the Royal Society of London, and 50 apiece by Whitehead and Russell themselves. Despite the initial loss, today there is likely no major academic library in the world which does not hold a copy of Principia Mathematica.

Question: Why was there a funding shortfall for the publishing of Princpia Mathematica?
Ans: the three-volume work was so massive (more than 2,000 pages) and its audience so narrow (professional mathematicians)

Article: World War I demonstrated that aircraft could be an important part of the battlefield, but in some nations it was the prospect of strategic air attack that was the main issue, presenting both a threat and an opportunity. The experience of four years of air attacks on London by Zeppelins and Gotha G.V bombers had particularly influenced the British and was one of if not the main driver for forming an independent air force. As the capabilities of aircraft and their engines improved it was clear that their role in future war would be even more critical as their range and weapon load grew. However, in the years immediately after World War I the prospect of another major war seemed remote, particularly in Europe where the most militarily capable nations were, and little financing was available.

Question: The future of aircraft in war situations was important because of the growth in what two areas?
Ans: their range and weapon load

Article: There are two broad categories of public funding, direct, which entails a monetary transfer to a party, and indirect, which includes broadcasting time on state media, use of the mail service or supplies. According to the Comparative Data from the ACE Electoral Knowledge Network, out of a sample of over 180 nations, 25% of nations provide no direct or indirect public funding, 58% provide direct public funding and 60% of nations provide indirect public funding. Some countries provide both direct and indirect public funding to political parties. Funding may be equal for all parties or depend on the results of previous elections or the number of candidates participating in an election. Frequently parties rely on a mix of private and public funding and are required to disclose their finances to the Election management body.

Question: What percentage of nations provide indirect funding?
Ans: 60%

Article: The fighter aircraft of the USAF are small, fast, and maneuverable military aircraft primarily used for air-to-air combat. Many of these fighters have secondary ground-attack capabilities, and some are dual-roled as fighter-bombers (e.g., the F-16 Fighting Falcon); the term "fighter" is also sometimes used colloquially for dedicated ground-attack aircraft. Other missions include interception of bombers and other fighters, reconnaissance, and patrol. The F-16 is currently used by the USAF Air Demonstration squadron, the Thunderbirds, while a small number of both man-rated and non-man-rated F-4 Phantom II are retained as QF-4 aircraft for use as Full Scale Aerial Targets (FSAT) or as part of the USAF Heritage Flight program. These extant QF-4 aircraft are being replaced in the FSAT role by early model F-16 aircraft converted to QF-16 configuration. The USAF has 2,025 fighters in service as of September 2012.

Question: What is the name of a type of dual purpose fighter-bomber aircraft used by the US Air Force?
Ans:
F-16 Fighting Falcon