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: Why did the population decline after this time?

Output: the loss of many middle-class union jobs


QUES: The styles that resulted fall within several categories. In the mainstream of Georgian style were both Palladian architecture— and its whimsical alternatives, Gothic and Chinoiserie, which were the English-speaking world's equivalent of European Rococo. From the mid-1760s a range of Neoclassical modes were fashionable, associated with the British architects Robert Adam, James Gibbs, Sir William Chambers, James Wyatt, George Dance the Younger, Henry Holland and Sir John Soane. John Nash was one of the most prolific architects of the late Georgian era known as The Regency style, he was responsible for designing large areas of London. Greek Revival architecture was added to the repertory, beginning around 1750, but increasing in popularity after 1800. Leading exponents were William Wilkins and Robert Smirke.

What modes were fashionable before the mid-1760s?
What is the answer?
ANS: unanswerable


QUES: Scholars disagree over the effects of social status on racial classifications in Brazil. It is generally believed that achieving upward mobility and education results in individuals being classified as a category of lighter skin. The popular claim is that in Brazil, poor whites are considered black and wealthy blacks are considered white. Some scholars disagree, arguing that "whitening" of one's social status may be open to people of mixed race, a large part of the population known as pardo, but a person perceived as preto (black) will continue to be classified as black regardless of wealth or social status.
What does Preto mean?

ANS: (black)


Slow progress has led to frustration, expressed by executive director of the Global Fund to Fight AIDS, Tuberculosis and Malaria – Mark Dybul: "we have the tools to end TB as a pandemic and public health threat on the planet, but we are not doing it." Several international organizations are pushing for more transparency in treatment, and more countries are implementing mandatory reporting of cases to the government, although adherence is often sketchy. Commercial treatment-providers may at times overprescribe second-line drugs as well as supplementary treatment, promoting demands for further regulations. The government of Brazil provides universal TB-care, which reduces this problem. Conversely, falling rates of TB-infection may not relate to the number of programs directed at reducing infection rates, but may be tied to increased level of education, income and health of the population. Costs of the disease, as calculated by the World Bank in 2009 may exceed 150 billion USD per year in "high burden" countries. Lack of progress eradicating the disease may also be due to lack of patient follow-up – as among the 250M rural migrants in China.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What organization said some countries might be spending as much as $150 billion each year on TB?
Ah, so.. World Bank


Question: Henry III rebuilt the abbey in honour of a royal saint, Edward the Confessor, whose relics were placed in a shrine in the sanctuary. Henry III himself was interred nearby, as were many of the Plantagenet kings of England, their wives and other relatives. Until the death of George II of Great Britain in 1760, most kings and queens were buried in the abbey, some notable exceptions being Henry VI, Edward IV, Henry VIII and Charles I who are buried in St George's Chapel at Windsor Castle. Other exceptions include Richard III, now buried at Leicester Cathedral, and the de facto queen Lady Jane Grey, buried in the chapel of St Peter ad Vincula in the Tower of London. Most monarchs and royals who died after 1760 are buried either in St George's Chapel or at Frogmore to the east of Windsor Castle.[citation needed]
Try to answer this question if possible: Where was Richard II buried?
Answer: unanswerable


QUES: The Samoan islands have been produced by vulcanism, the source of which is the Samoa hotspot which is probably the result of a mantle plume. While all of the islands have volcanic origins, only Savai'i, the western most island in Samoa, is volcanically active with the most recent eruptions in Mt Matavanu (1905–1911), Mata o le Afi (1902) and Mauga Afi (1725). The highest point in Samoa is Mt Silisili, at 1858 m (6,096 ft). The Saleaula lava fields situated on the central north coast of Savai'i are the result of the Mt Matavanu eruptions which left 50 km² (20 sq mi) of solidified lava.
Which of the Samoan islands has active volcanoes?

ANS:
Savai'i