The problem: Answer a question about this article:
Policing in Greater London, with the exception of the City of London, is provided by the Metropolitan Police Service, overseen by the Mayor through the Mayor's Office for Policing and Crime (MOPAC). The City of London has its own police force the City of London Police. The British Transport Police are responsible for police services on National Rail, London Underground, Docklands Light Railway and Tramlink services. A fourth police force in London, the Ministry of Defence Police, do not generally become involved with policing the general public.
Which police force in London does not typically engage in police activity with the general public?
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The answer: the Ministry of Defence Police

Problem: Please answer a question about the following article about Multiracial American:
The 2000 U.S. Census in the write-in response category had a code listing which standardizes the placement of various write-in responses for automatic placement within the framework of the U.S. Census's enumerated races. Whereas most responses can be distinguished as falling into one of the five enumerated races, there remains some write-in responses which fall into the "Mixture" heading which cannot be racially categorized. These include "Bi Racial, Combination, Everything, Many, Mixed, Multi National, Multiple, Several and Various".
What does the "mixture" heading mean?
A: cannot be racially categorized

Question: Read this and answer the question

Major air bases are located in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Nova Scotia, and Newfoundland and Labrador, while administrative and command and control facilities are located in Winnipeg and North Bay. A Canadian component of the NATO Airborne Early Warning Force is also based at NATO Air Base Geilenkirchen near Geilenkirchen, Germany.

Where are the command facilities located?
Answer: Winnipeg and North Bay

Problem: The influence of science also began appearing more commonly in poetry and literature during the Enlightenment. Some poetry became infused with scientific metaphor and imagery, while other poems were written directly about scientific topics. Sir Richard Blackmore committed the Newtonian system to verse in Creation, a Philosophical Poem in Seven Books (1712). After Newton's death in 1727, poems were composed in his honour for decades. James Thomson (17001748) penned his "Poem to the Memory of Newton," which mourned the loss of Newton, but also praised his science and legacy.
Whose death in 1727 prompted poems to be written in his honour for decades?
The answer is the following: Newton

The currentvoltage characteristic of an LED is similar to other diodes, in that the current is dependent exponentially on the voltage (see Shockley diode equation). This means that a small change in voltage can cause a large change in current. If the applied voltage exceeds the LED's forward voltage drop by a small amount, the current rating may be exceeded by a large amount, potentially damaging or destroying the LED. The typical solution is to use constant-current power supplies to keep the current below the LED's maximum current rating. Since most common power sources (batteries, mains) are constant-voltage sources, most LED fixtures must include a power converter, at least a current-limiting resistor. However, the high resistance of three-volt coin cells combined with the high differential resistance of nitride-based LEDs makes it possible to power such an LED from such a coin cell without an external resistor.
What feature do most LED fixtures need to have?
a power converter

Here is a question about this article: The skeleton consists of very lightweight bones. They have large air-filled cavities (called pneumatic cavities) which connect with the respiratory system. The skull bones in adults are fused and do not show cranial sutures. The orbits are large and separated by a bony septum. The spine has cervical, thoracic, lumbar and caudal regions with the number of cervical (neck) vertebrae highly variable and especially flexible, but movement is reduced in the anterior thoracic vertebrae and absent in the later vertebrae. The last few are fused with the pelvis to form the synsacrum. The ribs are flattened and the sternum is keeled for the attachment of flight muscles except in the flightless bird orders. The forelimbs are modified into wings.
What is the answer to this question: What consists of very lightweight bones?
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So...
The skeleton