Problem: Bras%C3%ADlia:

The metro leaves the Rodoviária (bus station) and goes south, avoiding most of the political and tourist areas. The main purpose of the metro is to serve cities, such as Samambaia, Taguatinga and Ceilândia, as well as Guará and Águas Claras. The satellite cities served are more populated in total than the Plano Piloto itself (the census of 2000 indicated that Ceilândia had 344,039 inhabitants, Taguatinga had 243,575, whereas the Plano Piloto had approximately 400,000 inhabitants), and most residents of the satellite cities depend on public transportation.

According to the 2000 census, how  many people lived in Guara?
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A: unanswerable


Problem: Russian Soviet Federative Socialist Republic:

On April 17, 1946, the Kaliningrad Oblast — the northern portion of the former German province of East Prussia—was annexed by the Soviet Union and made part of the Russian SFSR.

What administrative division did Kaliningrad Oblast become a part of?
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A: the Russian SFSR


Problem: Tuvalu:

In 1890 Robert Louis Stevenson, his wife Fanny Vandegrift Stevenson and her son Lloyd Osbourne sailed on the Janet Nicoll, a trading steamer owned by Henderson and Macfarlane of Auckland, New Zealand, which operated between Sydney and Auckland and into the central Pacific. The Janet Nicoll visited three of the Ellice Islands; while Fanny records that they made landfall at Funafuti, Niutao and Nanumea, Jane Resture suggests that it was more likely they landed at Nukufetau rather than Funafuti. An account of this voyage was written by Fanny Stevenson and published under the title The Cruise of the Janet Nichol, together with photographs taken by Robert Louis Stevenson and Lloyd Osbourne.

What type of ship was the Janet Nicoll?
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A: trading steamer


Problem: Antarctica:

Several governments maintain permanent manned research stations on the continent. The number of people conducting and supporting scientific research and other work on the continent and its nearby islands varies from about 1,000 in winter to about 5,000 in the summer, giving it a population density between 70 and 350 inhabitants per million square kilometres (180 and 900 per million square miles) at these times. Many of the stations are staffed year-round, the winter-over personnel typically arriving from their home countries for a one-year assignment. An Orthodox church—Trinity Church, opened in 2004 at the Russian Bellingshausen Station—is manned year-round by one or two priests, who are similarly rotated every year.

About long long do researchers stay when researching in Antarctica?
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A:
one-year