Problem: MP3:

The simplest type of MP3 file uses one bit rate for the entire file: this is known as Constant Bit Rate (CBR) encoding. Using a constant bit rate makes encoding simpler and faster. However, it is also possible to create files where the bit rate changes throughout the file. These are known as Variable Bit Rate (VBR) files. The idea behind this is that, in any piece of audio, some parts will be much easier to compress, such as silence or music containing only a few instruments, while others will be more difficult to compress. So, the overall quality of the file may be increased by using a lower bit rate for the less complex passages and a higher one for the more complex parts. With some encoders, it is possible to specify a given quality, and the encoder will vary the bit rate accordingly. Users who know a particular "quality setting" that is transparent to their ears can use this value when encoding all of their music, and generally speaking not need to worry about performing personal listening tests on each piece of music to determine the correct bit rate.

What does VBR stand for?
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A: Variable Bit Rate


Problem: The release of a video-game Starpower: Beyoncé was cancelled after Beyoncé pulled out of a $100 million with GateFive who alleged the cancellation meant the sacking of 70 staff and millions of pounds lost in development. It was settled out of court by her lawyers in June 2013 who said that they had cancelled because GateFive had lost its financial backers. Beyoncé also has had deals with American Express, Nintendo DS and L'Oréal since the age of 18.
How young was Beyonce when she acquired deals from American Express and L'Oreal?
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Answer: 18


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Game players were not the only ones to notice the violence in this game; US Senators Herb Kohl and Joe Lieberman convened a Congressional hearing on December 9, 1993 to investigate the marketing of violent video games to children.[e] While Nintendo took the high ground with moderate success, the hearings led to the creation of the Interactive Digital Software Association and the Entertainment Software Rating Board, and the inclusion of ratings on all video games. With these ratings in place, Nintendo decided its censorship policies were no longer needed.
What was the focus of the hearing about video game violence in 1993?
A: the marketing of violent video games to children


Context and question: The relationship between the Slavs and a tribe called the Veneti east of the River Vistula in the Roman period is uncertain. The name may refer both to Balts and Slavs.
What did the Roman period refer to?
Answer: unanswerable


Question: 187th Street crosses Washington Heights and running from Laurel Hill Terrace in the east to Chittenden Avenue in the west near the George Washington Bridge and Hudson River. The street is interrupted by a long set of stairs east of Fort Washington Avenue leading to the Broadway valley. West of there, it is mostly lined with store fronts and serves as a main shopping district for the Hudson Heights neighborhood.
Is there an answer to this question: Where do the stairs interrupting 187th street lead to?

Answer: Broadway valley


QUES: Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy, accounting for 16 percent of global electricity generation – 3,427 terawatt-hours of electricity production in 2010, and is expected to increase about 3.1% each year for the next 25 years. Hydroelectric plants have the advantage of being long-lived and many existing plants have operated for more than 100 years.

 What is the term not referring to electricity generated by hydropower?
What is the answer?
ANS:
unanswerable