Problem: Law of the United States:

Generally, American civil procedure has several notable features, including extensive pretrial discovery, heavy reliance on live testimony obtained at deposition or elicited in front of a jury, and aggressive pretrial "law and motion" practice designed to result in a pretrial disposition (that is, summary judgment) or a settlement. U.S. courts pioneered the concept of the opt-out class action, by which the burden falls on class members to notify the court that they do not wish to be bound by the judgment, as opposed to opt-in class actions, where class members must join into the class. Another unique feature is the so-called American Rule under which parties generally bear their own attorneys' fees (as opposed to the English Rule of "loser pays"), though American legislators and courts have carved out numerous exceptions.

What is an opt-out class action?
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A: the burden falls on class members to notify the court that they do not wish to be bound by the judgment

Problem: Tajikistan is officially a republic, and holds elections for the presidency and parliament, operating under a presidential system. It is, however, a dominant-party system, where the People's Democratic Party of Tajikistan routinely has a vast majority in Parliament. Emomalii Rahmon has held the office of President of Tajikistan continually since November 1994. The Prime Minister is Kokhir Rasulzoda, the First Deputy Prime Minister is Matlubkhon Davlatov and the two Deputy Prime Ministers are Murodali Alimardon and Ruqiya Qurbanova.
Who operates under a communist system?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Unemployment levels are low (31 individuals in 2013, compared to 50 in 2004 and 342 in 1998). Employment is dominated by the public sector, the number of government positions has fallen from 1,142 in 2006 to just over 800 in 2013. St Helena's private sector employs approximately 45% of the employed labour force and is largely dominated by small and micro businesses with 218 private businesses employing 886 in 2004.
How many private businesses employee people on Saint Helena?
A: 218

Context and question: Occasionally a bisyllabic word is written with two characters that contain the same radical, as in hudie "butterfly", where both characters have the insect radical . A notable example is pipa (a Chinese lute, also a fruit, the loquat, of similar shape) originally written as with the hand radical, referring to the down and up strokes when playing this instrument, which was then changed to (tree radical), which is still used for the fruit, while the character was changed to when referring to the instrument. In other cases a compound word may coincidentally share a radical without this being meaningful.
What is occasionally written with two characters that contain the same radical?
Answer: bisyllabic word

Question: The nitrogen fixing Rhizobia are an interesting case, wherein conjugative elements naturally engage in inter-kingdom conjugation. Such elements as the Agrobacterium Ti or Ri plasmids contain elements that can transfer to plant cells. Transferred genes enter the plant cell nucleus and effectively transform the plant cells into factories for the production of opines, which the bacteria use as carbon and energy sources. Infected plant cells form crown gall or root tumors. The Ti and Ri plasmids are thus endosymbionts of the bacteria, which are in turn endosymbionts (or parasites) of the infected plant.
Is there an answer to this question: What elements can transfer to plant cells?

Answer: Agrobacterium Ti or Ri plasmids

Problem: Qing dynasty:

Literature grew to new heights in the Qing period. Poetry continued as a mark of the cultivated gentleman, but women wrote in larger and larger numbers and poets came from all walks of life. The poetry of the Qing dynasty is a lively field of research, being studied (along with the poetry of the Ming dynasty) for its association with Chinese opera, developmental trends of Classical Chinese poetry, the transition to a greater role for vernacular language, and for poetry by women in Chinese culture. The Qing dynasty was a period of much literary collection and criticism, and many of the modern popular versions of Classical Chinese poems were transmitted through Qing dynasty anthologies, such as the Quantangshi and the Three Hundred Tang Poems. Pu Songling brought the short story form to a new level in his Strange Stories from a Chinese Studio, published in the mid-18th century, and Shen Fu demonstrated the charm of the informal memoir in Six Chapters of a Floating Life, written in the early 19th century but published only in 1877. The art of the novel reached a pinnacle in Cao Xueqin's Dream of the Red Chamber, but its combination of social commentary and psychological insight were echoed in highly skilled novels such as Wu Jingzi's The Scholars (1750) and Li Ruzhen's Flowers in the Mirror (1827).

Who wrote the novel Dream of the Red Chamber?
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A:
Cao Xueqin