Problem: Praça dos Três Poderes (Portuguese for Square of the Three Powers) is a plaza in Brasília. The name is derived from the encounter of the three federal branches around the plaza: the Executive, represented by the Palácio do Planalto (presidential office); the Legislative, represented by the National Congress (Congresso Nacional); and the Judicial branch, represented by the Supreme Federal Court (Supremo Tribunal Federal). It is a tourist attraction in Brasília, designed by Lúcio Costa and Oscar Niemeyer as a place where the three branches would meet harmoniously.
What is the presidential office designed by Lucio Costa and Oscar Niemeyer called?
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Answer: unanswerable


Problem: Greek demonstrates several linguistic features that are shared with other Balkan languages, such as Albanian, Bulgarian and Eastern Romance languages (see Balkan sprachbund), and has absorbed many foreign words, primarily of Western European and Turkish origin. Because of the movements of Philhellenism and the Diafotismos in the 19th century, which emphasized the modern Greeks' ancient heritage, these foreign influences were excluded from official use via the creation of Katharevousa, a somewhat artificial form of Greek purged of all foreign influence and words, as the official language of the Greek state. In 1976, however, the Hellenic Parliament voted to make the spoken Dimotiki the official language, making Katharevousa obsolete.
 What non-radical political changes occurred during the 19th century?
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Answer: unanswerable


Problem: The transition from hunting and gathering to agriculture is not necessarily a one way process. It has been argued that hunting and gathering represents an adaptive strategy, which may still be exploited, if necessary, when environmental change causes extreme food stress for agriculturalists. In fact, it is sometimes difficult to draw a clear line between agricultural and hunter-gatherer societies, especially since the widespread adoption of agriculture and resulting cultural diffusion that has occurred in the last 10,000 years.[citation needed] This anthropological view has remained unchanged since the 1960s.[clarification needed][citation needed]
What change from hunting and gathering to agriculture is not easy to mark?
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Answer:
transition