Problem: Railway electrification system:

DC systems (especially third-rail systems) are limited to relatively low voltages and this can limit the size and speed of trains and cannot use low-level platform and also limit the amount of air-conditioning that the trains can provide. This may be a factor favouring overhead wires and high-voltage AC, even for urban usage. In practice, the top speed of trains on third-rail systems is limited to 100 mph (160 km/h) because above that speed reliable contact between the shoe and the rail cannot be maintained.

The lowest speed of trains on third-rail systems is limited to what?
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A: unanswerable

Problem: Construction is currently underway on the Miami Intermodal Center and Miami Central Station, a massive transportation hub servicing Metrorail, Amtrak, Tri-Rail, Metrobus, Greyhound Lines, taxis, rental cars, MIA Mover, private automobiles, bicycles and pedestrians adjacent to Miami International Airport. Completion of the Miami Intermodal Center is expected to be completed by winter 2011, and will serve over 150,000 commuters and travelers in the Miami area. Phase I of Miami Central Station is scheduled to begin service in the spring of 2012, and Phase II in 2013.
What part of 2002 was to have seen Phase I of Miami Central Station begin?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The invention of electronic computers in the 1940s, along with the development of mathematical information theory, led to a realization that brains can potentially be understood as information processing systems. This concept formed the basis of the field of cybernetics, and eventually gave rise to the field now known as computational neuroscience. The earliest attempts at cybernetics were somewhat crude in that they treated the brain as essentially a digital computer in disguise, as for example in John von Neumann's 1958 book, The Computer and the Brain. Over the years, though, accumulating information about the electrical responses of brain cells recorded from behaving animals has steadily moved theoretical concepts in the direction of increasing realism.
Who wrote the book, The Computer and the Brain?
A: John von Neumann's

Context and question: On 2 March 1977 the General People's Congress adopted the "Declaration of the Establishment of the People's Authority" at Gaddafi's behest. Dissolving the Libyan Arab Republic, it was replaced by the Great Socialist People's Libyan Arab Jamahiriya (Arabic: , al-Jamahiriyah al-'Arabiyah al-Libiyah ash-Sha'biyah al-Ishtirakiyah), a "state of the masses" conceptualized by Gaddafi. Officially, the Jamahiriya was a direct democracy in which the people ruled themselves through the 187 Basic People's Congresses, where all adult Libyans participated and voted on national decisions. These then sent members to the annual General People's Congress, which was broadcast live on television. In principle, the People's Congresses were Libya's highest authority, with major decisions proposed by government officials or with Gaddafi himself requiring the consent of the People's Congresses.
How often did the General People's Congress occur?
Answer: annual

Question: In 1374 King Louis of Hungary approved the Privilege of Koszyce (Polish: "przywilej koszycki" or "ugoda koszycka") in Kosice in order to guarantee the Polish throne for his daughter Jadwiga. He broadened the definition of who was a member of the nobility and exempted the entire class from all but one tax (anowy, which was limited to 2 grosze from an (an old measure of land size)). In addition, the King's right to raise taxes was abolished; no new taxes could be raised without the agreement of the nobility. Henceforth, also, district offices (Polish: "urzedy ziemskie") were reserved exclusively for local nobility, as the Privilege of Koszyce forbade the king to grant official posts and major Polish castles to foreign knights. Finally, this privilege obliged the King to pay indemnities to nobles injured or taken captive during a war outside Polish borders.
Is there an answer to this question: WHy did King louis approve the privilege?

Answer: in order to guarantee the Polish throne for his daughter Jadwiga

QUES: In 2006, the Houston metropolitan area ranked first in Texas and third in the U.S. within the Category of "Best Places for Business and Careers" by Forbes magazine. Foreign governments have established 92 consular offices in Houston's metropolitan area, the third highest in the nation. Forty foreign governments maintain trade and commercial offices here and 23 active foreign chambers of commerce and trade associations. Twenty-five foreign banks representing 13 nations operate in Houston, providing financial assistance to the international community.

How many offices have been established in Houston by foreign governments?
What is the answer?
ANS:
92