Problem: MP3:

The immediate predecessors of MP3 were "Optimum Coding in the Frequency Domain" (OCF), and Perceptual Transform Coding (PXFM). These two codecs, along with block-switching contributions from Thomson-Brandt, were merged into a codec called ASPEC, which was submitted to MPEG, and which won the quality competition, but that was mistakenly rejected as too complex to implement. The first practical implementation of an audio perceptual coder (OCF) in hardware (Krasner's hardware was too cumbersome and slow for practical use), was an implementation of a psychoacoustic transform coder based on Motorola 56000 DSP chips.

What was the name of the codec that OCF, PFXM and other contributes merged into?
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A: ASPEC


Problem: After the end of the late Middle Ages period, the Renaissance would spread unevenly over continental Europe from the southern European region. The intellectual transformation of the Renaissance is viewed as a bridge between the Middle Ages and the Modern era. Europeans would later begin an era of world discovery. Combined with the influx of classical ideas was the invention of printing which facilitated dissemination of the printed word and democratized learning. These two things would lead to the Protestant Reformation. Europeans also discovered new trading routes, as was the case with Columbus’s travel to the Americas in 1492, and Vasco da Gama’s circumnavigation of Africa and India in 1498. Their discoveries strengthened the economy and power of European nations.
Along with the invention of printing, and the associated dissemination of the printed word, what other factor is not believed to have led to the Protestant Reformation?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The first Archivist, R.D.W. Connor, began serving in 1934, when the National Archives was established by Congress. As a result of a first Hoover Commission recommendation, in 1949 the National Archives was placed within the newly formed General Services Administration (GSA). The Archivist served as a subordinate official to the GSA Administrator until the National Archives and Records Administration became an independent agency on April 1, 1985.
Who was the first Archivist at the National Archives?
A: R.D.W. Connor


Context and question: These styles generally have either two f-shaped soundholes like a violin (F-5 and A-5), or an oval sound hole (F-4 and A-4 and lower models) directly under the strings. Much variation exists between makers working from these archetypes, and other variants have become increasingly common. Generally, in the United States, Gibson F-hole F-5 mandolins and mandolins influenced by that design are strongly associated with bluegrass, while the A-style is associated other types of music, although it too is most often used for and associated with bluegrass. The F-5's more complicated woodwork also translates into a more expensive instrument.
 What shape sounds holes do these styles of mandolins not have?
Answer: unanswerable


Question: Railway Himachal is famous for its narrow gauge tracks railways, one is UNESCO World Heritage Kalka-Shimla Railway and another one is Pathankot–Jogindernagar. Total length of these two tracks is 259 kilometres (161 mi). Kalka-Shimla Railway track passes through many tunnels, while Pathankot–Jogindernagar gently meanders through a maze of hills and valleys. It also has standard gauge railway track which connect Amb (Una district) to Delhi. A survey is being conducted to extend this railway line to Kangra (via Nadaun). Other proposed railways in the state are Baddi-Bilaspur, Dharamsala-Palampur and Bilaspur-Manali-Leh.
Is there an answer to this question: What is Railway Himachal famous for?

Answer: its narrow gauge tracks railways


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
French members of Parliament and other French politicians also organised a protest. All political parties in Parliament—UMP, Socialists, New Centre, Communists, Democratic Movement (centre) and Greens—jointly requested a pause in the National Assembly's session, which was granted, so that MPs could step outside and unfurl a banner which read "Respect for Human Rights in China". The coach containing the torch drove past the National Assembly and the assembled protesting MPs, who shouted "Freedom for Tibet!" several times as it passed.
What did the political parties request a brief stop in?
A:
the National Assembly's session