Problem: Web browser:

Web browsers consist of a user interface, layout engine, rendering engine, JavaScript interpreter, UI backend, networking component and data persistence component. These components achieve different functionalities of a web browser and together provide all capabilities of a web browser.

What parts of a layout engine make up a data persistence component?
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A: unanswerable


Problem: Guinea-Bissau was once part of the kingdom of Gabu, as well as part of the Mali Empire. Parts of this kingdom persisted until the 18th century, while a few others were under some rule by the Portuguese Empire since the 16th century. In the 19th century, it was colonized as Portuguese Guinea. Upon independence, declared in 1973 and recognised in 1974, the name of its capital, Bissau, was added to the country's name to prevent confusion with Guinea (formerly French Guinea). Guinea-Bissau has a history of political instability since independence, and no elected president has successfully served a full five-year term.
What empire was Guinea-Bissau once part of?
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Answer: Mali Empire


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Red is the international color of stop signs and stop lights on highways and intersections. It was standarized as the international color at the Vienna Convention on Road Signs and Signals of 1968. It was chosen partly because red is the brightest color in daytime (next to orange), though it is less visible at twilight, when green is the most visible color. Red also stands out more clearly against a cool natural backdrop of blue sky, green trees or gray buildings. But it was mostly chosen as the color for stoplights and stop signs because of its universal association with danger and warning.
What took place in 1986?
A: unanswerable


Context and question:  The English name Switzerland is a compound containing Switzer, an obsolete term for the Swiss, which was in use during the 16th to 19th centuries. The English adjective Swiss is a loan from French Suisse, also in use since the 16th century. The name Switzer is from the Alemannic Schwiizer, in origin an inhabitant of Schwyz and its associated territory, one of the Waldstätten cantons which formed the nucleus of the Old Swiss Confederacy. The name originates as an exonym, applied pars pro toto to the troops of the Confederacy. The Swiss began to adopt the name for themselves after the Swabian War of 1499, used alongside the term for "Confederates", Eidgenossen (literally: comrades by oath), used since the 14th century.
What did the Alemannic Schwiizer help form the nucleus of?
Answer: the Old Swiss Confederacy


Question: On June 25, 2006, Warren Buffett (then the world's richest person, estimated worth of US$62 billion as of April 16, 2008) pledged to give the foundation approximately 10 million Berkshire Hathaway Class B shares spread over multiple years through annual contributions, with the first year's donation of 500,000 shares being worth approximately US$1.5 billion. Buffett set conditions so that these contributions do not simply increase the foundation's endowment, but effectively work as a matching contribution, doubling the Foundation's annual giving: "Buffett's gift came with three conditions for the Gates foundation: Bill or Melinda Gates must be alive and active in its administration; it must continue to qualify as a charity; and each year it must give away an amount equal to the previous year's Berkshire gift, plus an additional amount equal to 5 percent of net assets. Buffett gave the foundation two years to abide by the third requirement." The Gates Foundation received 5% (500,000) of the shares in July 2006 and will receive 5% of the remaining earmarked shares in the July of each following year (475,000 in 2007, 451,250 in 2008). In July 2013, Buffet announced another donation of his company's Class B, this time in the amount worth $2 billion, is going to the Bill and Melinda Gates Foundation.
Is there an answer to this question: How many shares of berkshire hathway was pledged as a donation 

Answer: pledged to give the foundation approximately 10 million Berkshire Hathaway Class B shares


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In recent years the city government, under Mayor Manny Diaz, has taken an ambitious stance in support of bicycling in Miami for both recreation and commuting. Every month, the city hosts "Bike Miami", where major streets in Downtown and Brickell are closed to automobiles, but left open for pedestrians and bicyclists. The event began in November 2008, and has doubled in popularity from 1,500 participants to about 3,000 in the October 2009 Bike Miami. This is the longest-running such event in the US. In October 2009, the city also approved an extensive 20-year plan for bike routes and paths around the city. The city has begun construction of bike routes as of late 2009, and ordinances requiring bike parking in all future construction in the city became mandatory as of October 2009.
In what month in 2008 did Bike Miami start?
A:
November