Input: Read this: In 1940, non-Hispanic whites constituted 86.8% of the city's population. The population peaked at more than two million residents in 1950, then began to decline with the restructuring of industry, which led to the loss of many middle-class union jobs. In addition, suburbanization had been drawing off many of the wealthier residents to outlying railroad commuting towns and newer housing. Revitalization and gentrification of neighborhoods began in the late 1970s and continues into the 21st century, with much of the development in the Center City and University City areas of the city. After many of the old manufacturers and businesses left Philadelphia or shut down, the city started attracting service businesses and began to more aggressively market itself as a tourist destination. Glass-and-granite skyscrapers were built in Center City. Historic areas such as Independence National Historical Park located in Old City and Society Hill were renovated during the reformist mayoral era of the 1950s through the 1980s. They are now among the most desirable living areas of Center City. This has slowed the city's 40-year population decline after it lost nearly one-quarter of its population.
Question: How much of the population left after 1950?

Output: one-quarter


QUES: The 1961 eruption of Queen Mary's Peak forced the evacuation of the entire population via Cape Town to England. The following year a Royal Society expedition went to the islands to assess the damage, and reported that the settlement of Edinburgh of the Seven Seas had been only marginally affected. Most families returned in 1963.

What was the name of the settlement that was assessed after the evactuation?
What is the answer?
ANS: Edinburgh of the Seven Seas


QUES: Exclusive Jurisdiction is a concept whereby only one Grand Lodge will be recognised in any geographical area. If two Grand Lodges claim jurisdiction over the same area, the other Grand Lodges will have to choose between them, and they may not all decide to recognise the same one. (In 1849, for example, the Grand Lodge of New York split into two rival factions, each claiming to be the legitimate Grand Lodge. Other Grand Lodges had to choose between them until the schism was healed.) Exclusive Jurisdiction can be waived when the two over-lapping Grand Lodges are themselves in Amity and agree to share jurisdiction (for example, since the Grand Lodge of Connecticut is in Amity with the Prince Hall Grand Lodge of Connecticut, the principle of Exclusive Jurisdiction does not apply, and other Grand Lodges may recognise both).
What happens if two Grand Lodges try to establish themselves in the same area?

ANS: the other Grand Lodges will have to choose between them


Multi-layer printed circuit boards have trace layers inside the board. This is achieved by laminating a stack of materials in a press by applying pressure and heat for a period of time. This results in an inseparable one piece product. For example, a four-layer PCB can be fabricated by starting from a two-sided copper-clad laminate, etch the circuitry on both sides, then laminate to the top and bottom pre-preg and copper foil. It is then drilled, plated, and etched again to get traces on top and bottom layers.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): A five-layer PCB uses what kind of foil?
Ah, so.. unanswerable


Question: There is an entire literature concerning the "structure of matter", ranging from the "electrical structure" in the early 20th century, to the more recent "quark structure of matter", introduced today with the remark: Understanding the quark structure of matter has been one of the most important advances in contemporary physics.[further explanation needed] In this connection, physicists speak of matter fields, and speak of particles as "quantum excitations of a mode of the matter field". And here is a quote from de Sabbata and Gasperini: "With the word "matter" we denote, in this context, the sources of the interactions, that is spinor fields (like quarks and leptons), which are believed to be the fundamental components of matter, or scalar fields, like the Higgs particles, which are used to introduced mass in a gauge theory (and that, however, could be composed of more fundamental fermion fields)."[further explanation needed]
Try to answer this question if possible: What theory came after the quark structure of matter?
Answer: unanswerable


Problem: The causes of the Franco-Prussian War are deeply rooted in the events surrounding the unification of Germany. In the aftermath of the Austro–Prussian War of 1866, Prussia had annexed numerous territories and formed the North German Confederation. This new power destabilized the European balance of power established by the Congress of Vienna in 1815 after the Napoleonic Wars. Napoleon III, then the emperor of France, demanded compensations in Belgium and on the left bank of the Rhine to secure France's strategic position, which the Prussian chancellor, Otto von Bismarck, flatly refused. Prussia then turned its attention towards the south of Germany, where it sought to incorporate the southern German kingdoms, Bavaria, Württemberg, Baden and Hesse-Darmstadt, into a unified Prussia-dominated Germany. France was strongly opposed to any further alliance of German states, which would have significantly strengthened the Prussian military.
What are the causes of the Franco-Prussian War deeply rooted in?
---
Answer:
the unification of Germany