Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
At extremely large airports, a circuit is in place but not usually used. Rather, aircraft (usually only commercial with long routes) request approach clearance while they are still hours away from the airport, often before they even take off from their departure point. Large airports have a frequency called Clearance Delivery which is used by departing aircraft specifically for this purpose. This then allows aircraft to take the most direct approach path to the runway and land without worrying about interference from other aircraft. While this system keeps the airspace free and is simpler for pilots, it requires detailed knowledge of how aircraft are planning to use the airport ahead of time and is therefore only possible with large commercial airliners on pre-scheduled flights. The system has recently become so advanced that controllers can predict whether an aircraft will be delayed on landing before it even takes off; that aircraft can then be delayed on the ground, rather than wasting expensive fuel waiting in the air.
When do large aircraft request to use a circuit?
A: unanswerable

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The Philippines has had small grassroots movements for U.S. statehood. Originally part of the platform of the Progressive Party, then known as the Federalista Party, the party dropped it in 1907, which coincided with the name change. As recently as 2004, the concept of the Philippines becoming a U.S. state has been part of a political platform in the Philippines. Supporters of this movement include Filipinos who believe that the quality of life in the Philippines would be higher and that there would be less poverty there if the Philippines were an American state or territory. Supporters also include Filipinos that had fought as members of the United States Armed Forces in various wars during the Commonwealth period.
What was the most recent year of the Commonwealth pushing for statehood?
A: unanswerable

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In psychology, memory is the process in which information is encoded, stored, and retrieved. Encoding allows information from the outside world to be sensed in the form of chemical and physical stimuli. In the first stage the information must be changed so that it may be put into the encoding process. Storage is the second memory stage or process. This entails that information is maintained over short periods of time. Finally the third process is the retrieval of information that has been stored. Such information must be located and returned to the consciousness. Some retrieval attempts may be effortless due to the type of information, and other attempts to remember stored information may be more demanding for various reasons.
Which three processes does phychology recognize as memory?
A: process in which information is encoded, stored, and retrieved.

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Detroit has struggled with high crime for decades. Detroit held the title of murder capital between 1985-1987 with a murder rate around 58 per 100,000. Crime has since decreased and, in 2014, the murder rate was 43.4 per 100,000, lower than in St. Louis, Missouri. Although the murder rate increased by 6% during the first half of 2015, it was surpassed by St Louis and Baltimore which saw much greater spikes in violence. At year-end 2015, Detroit had 295 criminal homicides, down slightly from 299 in 2014.
How many murders did Detroit have in 2015?
A:
295