Input: Read this: According to John Everett-Heath, the author of Oxford Concise Dictionary of World Place Names, Hyderabad means "Haydar's city" or "lion city", from haydar (lion) and abad (city). It was named to honour the Caliph Ali Ibn Abi Talib, who was also known as Haydar because of his lion-like valour in battles. Andrew Petersen, a scholar of Islamic architecture, says the city was originally called Baghnagar (city of gardens). One popular theory suggests that Muhammad Quli Qutb Shah, the founder of the city, named it "Bhagyanagar" or "Bhagnagar" after Bhagmati, a local nautch (dancing) girl with whom he had fallen in love. She converted to Islam and adopted the title Hyder Mahal. The city was renamed Hyderabad in her honour. According to another source, the city was named after Haidar, the son of Quli Qutb Shah.
Question: Hyderabad was named in honor of someone, who was it?

Output: Caliph Ali Ibn Abi Talib

Input: Read this: After a visit to Brasilia, the French writer Simone de Beauvoir complained that all of its superquadras exuded "the same air of elegant monotony," and other observers have equated the city's large open lawns, plazas, and fields to wastelands. As the city has matured, some of these have gained adornments, and many have been improved by landscaping, giving some observers a sense of "humanized" spaciousness. Although not fully accomplished, the "Brasilia utopia" has produced a city of relatively high quality of life, in which the citizens live in forested areas with sporting and leisure structure (the superquadras) flanked by small commercial areas, bookstores and cafes; the city is famous for its cuisine and efficiency of transit.
Question: What is Brasilia famous for?

Output: its cuisine and efficiency of transit

Input: Read this: The Administrator of Prussia, the grandmaster of the Teutonic Order Maximilian III, son of emperor Maximilian II died in 1618. When Maximilian died, Albert's line died out, and the Duchy of Prussia passed to the Electors of Brandenburg, forming Brandenburg-Prussia. Taking advantage of the Swedish invasion of Poland in 1655, and instead of fulfilling his vassal's duties towards the Polish Kingdom, by joining forces with the Swedes and subsequent treaties of Wehlau, Labiau, and Oliva, Elector and Duke Frederick William succeeded in revoking king of Poland's sovereignty over the Duchy of Prussia in 1660. The absolutist elector also subdued the noble estates of Prussia.
Question: In what year was the treaty of Oliva signed?

Output: unanswerable

Input: Read this: In Canada, "the 51st state" is a phrase generally used in such a way as to imply that if a certain political course is taken, Canada's destiny will be as little more than a part of the United States. Examples include the Canada-United States Free Trade Agreement in 1988, the debate over the creation of a common defense perimeter, and as a potential consequence of not adopting proposals intended to resolve the issue of Quebec sovereignty, the Charlottetown Accord in 1992 and the Clarity Act in 1999.
Question: When was the Charlottetown Accord signed?

Output:
1992