Problem: Annelid:

Since annelids are soft-bodied, their fossils are rare – mostly jaws and the mineralized tubes that some of the species secreted. Although some late Ediacaran fossils may represent annelids, the oldest known fossil that is identified with confidence comes from about 518 million years ago in the early Cambrian period. Fossils of most modern mobile polychaete groups appeared by the end of the Carboniferous, about 299 million years ago. Palaeontologists disagree about whether some body fossils from the mid Ordovician, about 472 to 461 million years ago, are the remains of oligochaetes, and the earliest indisputable fossils of the group appear in the Tertiary period, which began 65 million years ago.

What period started around 372 million years ago?
---
A: unanswerable


Problem: Unicode has been criticized for failing to separately encode older and alternative forms of kanji which, critics argue, complicates the processing of ancient Japanese and uncommon Japanese names. This is often due to the fact that Unicode encodes characters rather than glyphs (the visual representations of the basic character that often vary from one language to another). Unification of glyphs leads to the perception that the languages themselves, not just the basic character representation, are being merged.[clarification needed] There have been several attempts to create alternative encodings that preserve the stylistic differences between Chinese, Japanese, and Korean characters in opposition to Unicode's policy of Han unification. An example of one is TRON (although it is not widely adopted in Japan, there are some users who need to handle historical Japanese text and favor it).
What perception does the unification of glyphs cause? 
---
Answer: the languages themselves, not just the basic character representation, are being merged


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Solar energy may be used in a water stabilisation pond to treat waste water without chemicals or electricity. A further environmental advantage is that algae grow in such ponds and consume carbon dioxide in photosynthesis, although algae may produce toxic chemicals that make the water unusable.
What is a possible negative effect of algae in water stabilization ponds?
A: toxic chemicals


Context and question: Many causes for the financial crisis have been suggested, with varying weight assigned by experts. The U.S. Senate's Levin–Coburn Report concluded that the crisis was the result of "high risk, complex financial products; undisclosed conflicts of interest; the failure of regulators, the credit rating agencies, and the market itself to rein in the excesses of Wall Street." The Financial Crisis Inquiry Commission concluded that the financial crisis was avoidable and was caused by "widespread failures in financial regulation and supervision", "dramatic failures of corporate governance and risk management at many systemically important financial institutions", "a combination of excessive borrowing, risky investments, and lack of transparency" by financial institutions, ill preparation and inconsistent action by government that "added to the uncertainty and panic", a "systemic breakdown in accountability and ethics", "collapsing mortgage-lending standards and the mortgage securitization pipeline", deregulation of over-the-counter derivatives, especially credit default swaps, and "the failures of credit rating agencies" to correctly price risk. The 1999 repeal of the Glass-Steagall Act effectively removed the separation between investment banks and depository banks in the United States. Critics argued that credit rating agencies and investors failed to accurately price the risk involved with mortgage-related financial products, and that governments did not adjust their regulatory practices to address 21st-century financial markets. Research into the causes of the financial crisis has also focused on the role of interest rate spreads.
What agency failed to accurately price risk involved in mortgage-related financial products?
Answer: credit rating agencies


Question: The first commutator DC electric motor capable of turning machinery was invented by the British scientist William Sturgeon in 1832. Following Sturgeon's work, a commutator-type direct-current electric motor made with the intention of commercial use was built by the American inventor Thomas Davenport, which he patented in 1837. The motors ran at up to 600 revolutions per minute, and powered machine tools and a printing press. Due to the high cost of primary battery power, the motors were commercially unsuccessful and Davenport went bankrupt. Several inventors followed Sturgeon in the development of DC motors but all encountered the same battery power cost issues. No electricity distribution had been developed at the time. Like Sturgeon's motor, there was no practical commercial market for these motors.
Is there an answer to this question: Who developed the first mnotor capable of being used for machinery?

Answer: William Sturgeon


The junior U.S. Senator from Massachusetts, Paul Tsongas, announced in 1984 that he would be stepping down for health reasons. Kerry ran, and as in his 1982 race for Lieutenant Governor, he did not receive the endorsement of the party regulars at the state Democratic convention. Congressman James Shannon, a favorite of House Speaker Tip O'Neill, was the early favorite to win the nomination, and he "won broad establishment support and led in early polling." Again as in 1982, however, Kerry prevailed in a close primary.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What was Paul Tsongas's job in 1984?
Ah, so..
junior U.S. Senator from Massachusetts