Problem: Bras%C3%ADlia:

The Palácio do Planalto is the official workplace of the President of Brazil. It is located at the Praça dos Três Poderes in Brasília. As the seat of government, the term "Planalto" is often used as a metonym for the executive branch of government. The main working office of the President of the Republic is in the Palácio do Planalto. The President and his or her family do not live in it, rather in the official residence, the Palácio da Alvorada. Besides the President, senior advisors also have offices in the "Planalto," including the Vice-President of Brazil and the Chief of Staff. The other Ministries are along the Esplanada dos Ministérios. The architect of the Palácio do Planalto was Oscar Niemeyer, creator of most of the important buildings in Brasília. The idea was to project an image of simplicity and modernity using fine lines and waves to compose the columns and exterior structures. The Palace is four stories high, and has an area of 36,000 m2. Four other adjacent buildings are also part of the complex.

How large is the Planalto?
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A: 36,000 m2


Problem: Red, white, and black were the colors of the German Empire from 1870 to 1918, and as such they came to be associated with German nationalism. In the 1920s they were adopted as the colors of the Nazi flag. In Mein Kampf, Hitler explained that they were "revered colors expressive of our homage to the glorious past." The red part of the flag was also chosen to attract attention - Hitler wrote: "the new flag ... should prove effective as a large poster" because "in hundreds of thousands of cases a really striking emblem may be the first cause of awakening interest in a movement." The red also symbolized the social program of the Nazis, aimed at German workers. Several designs by a number of different authors were considered, but the one adopted in the end was Hitler's personal design.
Who explained the colors in Kampf Mein?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In the United States, heating, ventilation and air conditioning (HVAC) systems account for 30% (4.65 EJ/yr) of the energy used in commercial buildings and nearly 50% (10.1 EJ/yr) of the energy used in residential buildings. Solar heating, cooling and ventilation technologies can be used to offset a portion of this energy.
What percentage of energy in commercial buildings comes from HVAC systems?
A: 50


Context and question: Some writers claim the Air Staff ignored a critical lesson, however: British morale did not break. Targeting German morale, as Bomber Command would do, was no more successful. Aviation strategists dispute that morale was ever a major consideration for Bomber Command. Throughout 1933–39 none of the 16 Western Air Plans drafted mentioned morale as a target. The first three directives in 1940 did not mention civilian populations or morale in any way. Morale was not mentioned until the ninth wartime directive on 21 September 1940. The 10th directive in October 1940 mentioned morale by name. However, industrial cities were only to be targeted if weather denied strikes on Bomber Command's main concern, oil.
When was morale finally mentioned?
Answer: ninth wartime directive on 21 September 1940


Question: Kaszycka et al. (2009) in 2002–2003 surveyed European anthropologists' opinions toward the biological race concept. Three factors, country of academic education, discipline, and age, were found to be significant in differentiating the replies. Those educated in Western Europe, physical anthropologists, and middle-aged persons rejected race more frequently than those educated in Eastern Europe, people in other branches of science, and those from both younger and older generations." The survey shows that the views on race are sociopolitically (ideologically) influenced and highly dependent on education."
Is there an answer to this question: What years did Kaszycka survey Eureopean anthropolgists' opinions toward the biological race concept?

Answer: 2002–2003


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Traditionally Nanjing's nightlife was mostly centered around Nanjing Fuzimiao (Confucius Temple) area along the Qinhuai River, where night markets, restaurants and pubs thrived. Boating at night in the river was a main attraction of the city. Thus, one can see the statues of the famous teachers and educators of the past not too far from those of the courtesans who educated the young men in the other arts.
Where have Nanjing's after-hours activities typically been located?
A:
around Nanjing Fuzimiao (Confucius Temple) area along the Qinhuai River