Problem: Chinese characters:

Just as Roman letters have a characteristic shape (lower-case letters mostly occupying the x-height, with ascenders or descenders on some letters), Chinese characters occupy a more or less square area in which the components of every character are written to fit in order to maintain a uniform size and shape, especially with small printed characters in Ming and sans-serif styles. Because of this, beginners often practise writing on squared graph paper, and the Chinese sometimes use the term "Square-Block Characters" (方块字 / 方塊字, fāngkuàizì), sometimes translated as tetragraph, in reference to Chinese characters.

What have a characteristic shape?
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A: Roman letters


Problem: Darwin's barnacle studies convinced him that variation arose constantly and not just in response to changed circumstances. In 1854, he completed the last part of his Beagle-related writing and began working full-time on evolution. His thinking changed from the view that species formed in isolated populations only, as on islands, to an emphasis on speciation without isolation; that is, he saw increasing specialisation within large stable populations as continuously exploiting new ecological niches. He conducted empirical research focusing on difficulties with his theory. He studied the developmental and anatomical differences between different breeds of many domestic animals, became actively involved in fancy pigeon breeding, and experimented (with the help of his son Francis) on ways that plant seeds and animals might disperse across oceans to colonise distant islands. By 1856, his theory was much more sophisticated, with a mass of supporting evidence.
By which year had Darwin's theory become more complex and supported by a lot of evidence?
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Answer: 1856


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Shooting as practised in Britain, as opposed to traditional hunting, requires little questing for game—around thirty-five million birds are released onto shooting estates every year, some having been factory farmed. Shoots can be elaborate affairs with guns placed in assigned positions and assistants to help load shotguns. When in position, "beaters" move through the areas of cover, swinging sticks or flags to drive the game out. Such events are often called "drives". The open season for grouse in the UK begins on 12 August, the so-called Glorious Twelfth. The definition of game in the United Kingdom is governed by the Game Act 1831.
About how many birds are released onto shooting estates every year?
A: thirty-five million


Context and question: Though almost any variety of acoustic mandolin might be adequate for Irish traditional music, virtually all Irish players prefer flat-backed instruments with oval sound holes to the Italian-style bowl-back mandolins or the carved-top mandolins with f-holes favoured by bluegrass mandolinists. The former are often too soft-toned to hold their own in a session (as well as having a tendency to not stay in place on the player's lap), whilst the latter tend to sound harsh and overbearing to the traditional ear. The f-hole mandolin, however, does come into its own in a traditional session, where its brighter tone cuts through the sonic clutter of a pub. Greatly preferred for formal performance and recording are flat-topped "Irish-style" mandolins (reminiscent of the WWI-era Martin Army-Navy mandolin) and carved (arch) top mandolins with oval soundholes, such as the Gibson A-style of the 1920s.
Which mandolin was preferred for formal performances and recordings? 
Answer: flat-topped "Irish-style" mandolins


Question: Shortly after the end of the war in May 1945, Germans who had fled in early 1945 tried to return to their homes in East Prussia. An estimated number of 800,000 Germans were living in East Prussia during the summer of 1945. Many more were prevented from returning,[citation needed] and the German population of East Prussia was almost completely expelled by the communist regimes. During the war and for some time thereafter 45 camps were established for about 200,000-250,000 forced labourers, the vast majority of whom were deported to the Soviet Union, including the Gulag camp system. The largest camp with about 48,000 inmates was established at Deutsch Eylau (Iława). Orphaned children who were left behind in the zone occupied by the Soviet Union were referred to as Wolf children.
Is there an answer to this question: How many Wolf children were there?

Answer: unanswerable


QUES: In 2004, the Swaziland government acknowledged for the first time that it suffered an AIDS crisis, with 38.8% of tested pregnant women infected with HIV (see AIDS in Africa). The then Prime Minister Themba Dlamini declared a humanitarian crisis due to the combined effect of drought, land degradation, increased poverty, and HIV/AIDS. According to the 2011 UNAIDS Report, Swaziland is close to achieving universal access to HIV/AIDS treatment, defined as 80% coverage or greater. Estimates of treatment coverage range from 70% to 80% of those infected. Life expectancy had fallen from 61 years in 2000 to 32 years in 2009. Tuberculosis is also a significant problem, with an 18% mortality rate. Many patients have a multi-drug resistant strain, and 83% are co-infected with HIV.

Who declared a humanitarian crisis in Africa?
What is the answer?
ANS:
unanswerable