Problem: MP3:

The initial near-complete MPEG-1 standard (parts 1, 2 and 3) was publicly available on 6 December 1991 as ISO CD 11172. In most countries, patents cannot be filed after prior art has been made public, and patents expire 20 years after the initial filing date, which can be up to 12 months later for filings in other countries. As a result, patents required to implement MP3 expired in most countries by December 2012, 21 years after the publication of ISO CD 11172.

What became publicly available on 6 December 1991?
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A: MPEG-1 standard


Problem: In contrast, procedural memory (or implicit memory) is not based on the conscious recall of information, but on implicit learning. It can best be summarized as remember how to do something. Procedural memory is primarily employed in learning motor skills and should be considered a subset of implicit memory. It is revealed when one does better in a given task due only to repetition - no new explicit memories have been formed, but one is unconsciously accessing aspects of those previous experiences. Procedural memory involved in motor learning depends on the cerebellum and basal ganglia.
What is another term for procedural memory?
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Answer: implicit memory


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In exchange for Rupert Murdoch's support, Blair agreed not to join the European Exchange Rate Mechanism – which John Major had withdrawn the country from in September 1992 after barely two years. Cabinet Minister Peter Mandelson was "outed" by Matthew Parris (a former Sun columnist) on BBC TV's Newsnight in November 1998. Misjudging public response, The Sun's editor David Yelland demanded to know in a front page editorial whether Britain was governed by a "gay mafia" of a "closed world of men with a mutual self-interest". Three days later the paper apologised in another editorial which said The Sun would never again reveal a person's sexuality unless it could be defended on the grounds of "overwhelming public interest".
What happened on BBC's Newsnight in 1998?
A: Peter Mandelson was "outed" by Matthew Parris


Context and question: As of 2015 a variety of murals from internationally recognized street artists have appeared throughout the city as a result of the efforts of Art Whino and RVA Magazine with The Richmond Mural Project and the RVA Street Art Festival. Artists who have produced work in the city as a result of these festivals include ROA, Pixel Pancho, Gaia, Aryz, Alexis Diaz, Ever Siempre, Jaz, 2501, Natalia Rak, Pose MSK, Vizie, Jeff Soto, Mark Jenkins, Etam Cru- and local artists Hamilton Glass, Nils Westergard, and El Kamino. Both festivals are expected to continue this year with artists such as Ron English slated to produce work.
What periodical has attempted to attract internationally known mural artists to Richmond?
Answer: RVA


Question: A 2007 study conducted by the National Science Foundation found that biodiversity and genetic diversity are codependent—that diversity among species requires diversity within a species, and vice versa. "If any one type is removed from the system, the cycle can break down, and the community becomes dominated by a single species." At present, the most threatened ecosystems are found in fresh water, according to the Millennium Ecosystem Assessment 2005, which was confirmed by the "Freshwater Animal Diversity Assessment", organised by the biodiversity platform, and the French Institut de recherche pour le développement (MNHNP).
Is there an answer to this question: In which year was the study published that found biodiversity and genetic diversity are codependent?

Answer: 2007


In 1875, blacks made up 57% of the city's population, and 73% of Charleston County. With leadership by members of the antebellum free black community, historian Melinda Meeks Hennessy described the community as "unique" in being able to defend themselves without provoking "massive white retaliation", as occurred in numerous other areas during Reconstruction. In the 1876 election cycle, two major riots between black Republicans and white Democrats occurred in the city, in September and the day after the election in November, as well as a violent incident in Cainhoy at an October joint discussion meeting.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): The second riot of 1867 happened when?
Ah, so..
unanswerable