Problem: Classical music:

In 1997, the Vienna Philharmonic was "facing protests during a [US] tour" by the National Organization for Women and the International Alliance for Women in Music. Finally, "after being held up to increasing ridicule even in socially conservative Austria, members of the orchestra gathered [on 28 February 1997] in an extraordinary meeting on the eve of their departure and agreed to admit a woman, Anna Lelkes, as harpist." As of 2013, the orchestra has six female members; one of them, violinist Albena Danailova became one of the orchestra's concertmasters in 2008, the first woman to hold that position. In 2012, women still made up just 6% of the orchestra's membership. VPO president Clemens Hellsberg said the VPO now uses completely screened blind auditions.

Who was the first woman admitted to the Vienna Philharmonic?
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A: Anna Lelkes

Problem: The Portuguese explorer Diogo Cao reached the mouth of the Congo in 1484. Commercial relationships quickly grew between the inland Bantu kingdoms and European merchants who traded various commodities, manufactured goods, and people captured from the hinterlands. After centuries as a major hub for transatlantic trade, direct European colonization of the Congo river delta began in the late 19th century, subsequently eroding the power of the Bantu societies in the region.
What is an example of something that was not traded between the Bantu and European merchants?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
John Keate, Head Master from 1809 to 1834, took over at a time when discipline was poor. Anthony Chenevix-Trench, Head Master from 1964 to 1970, abolished the birch and replaced it with caning, also applied to the bare posterior, which he administered privately in his office. Chenevix-Trench also abolished corporal punishment administered by senior boys. Previously, House Captains were permitted to cane miscreants over the seat of the trousers. This was a routine occurrence, carried out privately with the boy bending over with his head under the edge of a table. Less common but more severe were the canings administered by Pop (see Eton Society below) in the form of a "Pop-Tanning", in which a large number of hard strokes were inflicted by the President of Pop in the presence of all Pop members (or, in earlier times, each member of Pop took it in turns to inflict a stroke). The culprit was summoned to appear in a pair of old trousers, as the caning would cut the cloth to shreds. This was the most severe form of physical punishment at Eton.
Who was one of the President's of Pop?
A: unanswerable

Context and question: Another point of interest is the Old Town. In the centre are the large Marktkirche (Church St. Georgii et Jacobi, preaching venue of the bishop of the Lutheran Landeskirche Hannovers) and the Old Town Hall. Nearby are the Leibniz House, the Nolte House, and the Beguine Tower. A very nice quarter of the Old Town is the Kreuz-Church-Quarter around the Kreuz Church with many nice little lanes. Nearby is the old royal sports hall, now called the Ballhof theatre. On the edge of the Old Town are the Market Hall, the Leine Palace, and the ruin of the Aegidien Church which is now a monument to the victims of war and violence. Through the Marstall Gate you arrive at the bank of the river Leine, where the world-famous Nanas of Niki de Saint-Phalle are located. They are part of the Mile of Sculptures, which starts from Trammplatz, leads along the river bank, crosses Konigsworther Square, and ends at the entrance of the Georgengarten. Near the Old Town is the district of Calenberger Neustadt where the Catholic Basilica Minor of St. Clemens, the Reformed Church and the Lutheran Neustadter Hof- und Stadtkirche St. Johannis are located.
What starts at the Trammplatz and stops at the river bank?
Answer: unanswerable

Question: The Sumerians were a non-Semitic caucasoid people, and spoke a language isolate; a number of linguists believed they could detect a substrate language beneath Sumerian, because names of some of Sumer's major cities are not Sumerian, revealing influences of earlier inhabitants. However, the archaeological record shows clear uninterrupted cultural continuity from the time of the early Ubaid period (5300 4700 BC C-14) settlements in southern Mesopotamia. The Sumerian people who settled here farmed the lands in this region that were made fertile by silt deposited by the Tigris and the Euphrates rivers.
Is there an answer to this question: When were settlements started in southern Mesopotamia?

Answer: early Ubaid period

Problem: Compact disc:

Meanwhile, with the advent and popularity of Internet-based distribution of files in lossily-compressed audio formats such as MP3, sales of CDs began to decline in the 2000s. For example, between 2000 - 2008, despite overall growth in music sales and one anomalous year of increase, major-label CD sales declined overall by 20%, although independent and DIY music sales may be tracking better according to figures released 30 March 2009, and CDs still continue to sell greatly. As of 2012, CDs and DVDs made up only 34 percent of music sales in the United States. In Japan, however, over 80 percent of music was bought on CDs and other physical formats as of 2015.

When did MP3 sales take off in Japan?
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A:
unanswerable