The problem: Answer a question about this article:
Marcin Wozniak and colleagues (2010) searched for specifically Slavic sub-group of R1a1a [M17]. Working with haplotypes, they found a pattern among Western Slavs which turned out to correspond to a newly discovered marker, M458, which defines subclade R1a1a7. This marker correlates remarkably well with the distribution of Slavic-speakers today. The team led by Peter Underhill, which discovered M458, did not consider the possibility that this was a Slavic marker, since they used the "evolutionary effective" mutation rate, which gave a date far too old to be Slavic. Wozniak and colleagues pointed out that the pedigree mutation rate, giving a later date, is more consistent with the archaeological record.
Who searched for specifically Slavic sub-group of R1a1a [M17]?
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The answer: Marcin Wozniak and colleagues

The problem: Answer a question about this article:
In more sophisticated computers there may be one or more RAM cache memories, which are slower than registers but faster than main memory. Generally computers with this sort of cache are designed to move frequently needed data into the cache automatically, often without the need for any intervention on the programmer's part.
RAM cache memory is slower than what?
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The answer: registers

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A similar struggle began in India when the Government of India Act 1919 failed to satisfy demand for independence. Concerns over communist and foreign plots following the Ghadar Conspiracy ensured that war-time strictures were renewed by the Rowlatt Acts. This led to tension, particularly in the Punjab region, where repressive measures culminated in the Amritsar Massacre. In Britain public opinion was divided over the morality of the event, between those who saw it as having saved India from anarchy, and those who viewed it with revulsion. The subsequent Non-Co-Operation movement was called off in March 1922 following the Chauri Chaura incident, and discontent continued to simmer for the next 25 years.
In what region was the Amritsar Massacre?
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The answer: Punjab

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There are two levels of service provided a free service to civilians and licensed service to the Chinese government and military. The free civilian service has a 10-meter location-tracking accuracy, synchronizes clocks with an accuracy of 10 nanoseconds, and measures speeds to within 0.2 m/s. The restricted military service has a location accuracy of 10 centimetres, can be used for communication, and will supply information about the system status to the user. To date, the military service has been granted only to the People's Liberation Army and to the Military of Pakistan.
What is something the licensed military service can be used for?
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The answer:
communication