Problem: Federalism:

In Brazil, the fall of the monarchy in 1889 by a military coup d'etat led to the rise of the presidential system, headed by Deodoro da Fonseca. Aided by well-known jurist Ruy Barbosa, Fonseca established federalism in Brazil by decree, but this system of government would be confirmed by every Brazilian constitution since 1891, although some of them would distort some of the federalist principles. The 1937 Constitution, for example, granted the federal government the authority to appoint State Governors (called interventors) at will, thus centralizing power in the hands of President Getulio Vargas. Brazil also uses the Fonseca system to regulate interstate trade. Brazil is one of the biggest federal governments.

Who caused the fall of the monarchy happened in Brazil?
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A: military coup d'etat led to the rise of the presidential system, headed by Deodoro da Fonseca.

Problem: Dogs have lived and worked with humans in so many roles that they have earned the unique nickname, "man's best friend", a phrase used in other languages as well. They have been bred for herding livestock, hunting (e.g. pointers and hounds), rodent control, guarding, helping fishermen with nets, detection dogs, and pulling loads, in addition to their roles as companions. In 1957, a husky-terrier mix named Laika became the first animal to orbit the Earth.
Certain dogs are bred to help fishermen with what?
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Answer: nets

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Since the 1990s, there has been consolidation in New Zealand's state-owned tertiary education system. In the polytechnic sector: Wellington Polytechnic amalgamated with Massey University. The Central Institute of Technology explored a merger with the Waikato Institute of Technology, which was abandoned, but later, after financial concerns, controversially amalgamated with Hutt Valley Polytechnic, which in turn became Wellington Institute of Technology. Some smaller polytechnics in the North Island, such as Waiarapa Polytechnic, amalgamated with UCOL. (The only other amalgamations have been in the colleges of education.)
In what decade did New Zealand's tertiary education institutions begin consolidation?
A: 1990s

Context and question: Passive air defence is defined by NATO as "Passive measures taken for the physical defence and protection of personnel, essential installations and equipment in order to minimize the effectiveness of air and/or missile attack". It remains a vital activity by ground forces and includes camouflage and concealment to avoid detection by reconnaissance and attacking aircraft. Measures such as camouflaging important buildings were common in the Second World War. During the Cold War the runways and taxiways of some airfields were painted green.
What was camouflaged during World War II?
Answer: important buildings

Question: George Dayton had founded his Dayton's Dry Goods store in Minneapolis in 1902 and the AMC cooperative in 1912. His descendants built Southdale Center in 1956, opened the Target discount store chain in 1962 and the B. Dalton Bookseller chain in 1966. Dayton's grew to 19 stores under the Dayton's name plus five other regional names acquired by Dayton-Hudson. The Dayton-Hudson Corporation closed the flagship J. L. Hudson Department Store in downtown Detroit in 1983, but expanded its other retail operations. It acquired Mervyn's in 1978, Marshall Field's in 1990, and renamed itself the Target Corporation in 2000. In 2002, Dayton's and Hudson's were consolidated into the Marshall Field's name. In 2005, May Department Stores acquired all of the Marshall Field's stores and shortly thereafter, Macy's acquired May.
Is there an answer to this question: What store did the Dayton-Hudson Corporation purchase in 1987?

Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Similarly, in the United States, the independent National Research Council has noted that "sufficient domestic renewable resources exist to allow renewable electricity to play a significant role in future electricity generation and thus help confront issues related to climate change, energy security, and the escalation of energy costs Renewable energy is an attractive option because renewable resources available in the United States, taken collectively, can supply significantly greater amounts of electricity than the total current or projected domestic demand." .
In what country is the National Research Council located?
A:
United States