Problem: Mandolin:

The mandolin's popularity in the United States was spurred by the success of a group of touring young European musicians known as the Estudiantina Figaro, or in the United States, simply the "Spanish Students." The group landed in the U.S. on January 2, 1880 in New York City, and played in Boston and New York to wildly enthusiastic crowds. Ironically, this ensemble did not play mandolins but rather bandurrias, which are also small, double-strung instruments that resemble the mandolin. The success of the Figaro Spanish Students spawned other groups who imitated their musical style and costumes. An Italian musician, Carlo Curti, hastily started a musical ensemble after seeing the Figaro Spanish Students perform; his group of Italian born Americans called themselves the "Original Spanish Students," counting on the American public to not know the difference between the Spanish bandurrias and Italian mandolins. The imitators' use of mandolins helped to generate enormous public interest in an instrument previously relatively unknown in the United States.

What did the Origianl Spanish Students expect the African public not to know?
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A: unanswerable

Problem: From the fifth-generation iPod on, Apple introduced a user-configurable volume limit in response to concerns about hearing loss. Users report that in the sixth-generation iPod, the maximum volume output level is limited to 100 dB in EU markets. Apple previously had to remove iPods from shelves in France for exceeding this legal limit. However, users that have bought a new sixth-generation iPod in late 2013 have reported a new option that allowed them to disable the EU volume limit. It has been said that these new iPods came with an updated software that allowed this change. Older sixth-generation iPods, however, are unable to update to this software version.
What country originally pulled iPods due to higher-than-allowed volume levels?
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Answer: France

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
On March 30, 2015, it was announced that Beyonce is a co-owner, with various other music artists, in the music streaming service Tidal. The service specialises in lossless audio and high definition music videos. Beyonce's husband Jay Z acquired the parent company of Tidal, Aspiro, in the first quarter of 2015. Including Beyonce and Jay-Z, sixteen artist stakeholders (such as Kanye West, Rihanna, Madonna, Chris Martin, Nicki Minaj and more) co-own Tidal, with the majority owning a 3% equity stake. The idea of having an all artist owned streaming service was created by those involved to adapt to the increased demand for streaming within the current music industry, and to rival other streaming services such as Spotify, which have been criticised for their low payout of royalties. "The challenge is to get everyone to respect music again, to recognize its value", stated Jay-Z on the release of Tidal.
What is the parent company of the music service Beyonce owns part of?
A: Aspiro

Context and question: By 1640, the town's theocratic government and nine-square grid plan were in place, and the town was renamed Newhaven from Quinnipiac. However, the area north of New Haven remained Quinnipiac until 1678, when it was renamed Hamden. The settlement became the headquarters of the New Haven Colony. At the time, the New Haven Colony was separate from the Connecticut Colony, which had been established to the north centering on Hartford. One of the principal differences between the two colonies was that the New Haven colony was an intolerant theocracy that did not permit other churches to be established, while the Connecticut colony permitted the establishment of other churches.
What made New Haven different from the other colonies in Connecticut?
Answer: an intolerant theocracy

Question: In September 2008, the crisis hit its most critical stage. There was the equivalent of a bank run on the money market funds, which frequently invest in commercial paper issued by corporations to fund their operations and payrolls. Withdrawal from money markets were $144.5 billion during one week, versus $7.1 billion the week prior. This interrupted the ability of corporations to rollover (replace) their short-term debt. The U.S. government responded by extending insurance for money market accounts analogous to bank deposit insurance via a temporary guarantee and with Federal Reserve programs to purchase commercial paper. The TED spread, an indicator of perceived credit risk in the general economy, spiked up in July 2007, remained volatile for a year, then spiked even higher in September 2008, reaching a record 4.65% on October 10, 2008.
Is there an answer to this question: When did the financial crisis hit its most critical stage?

Answer: September 2008

QUES: Vaccines rely on immune modulation or augmentation. Vaccination either excites or reinforces the immune competence of a host to ward off infection, leading to the activation of macrophages, the production of antibodies, inflammation, and other classic immune reactions. Antibacterial vaccines have been responsible for a drastic reduction in global bacterial diseases. Vaccines made from attenuated whole cells or lysates have been replaced largely by less reactogenic, cell-free vaccines consisting of purified components, including capsular polysaccharides and their conjugates, to protein carriers, as well as inactivated toxins (toxoids) and proteins.

What types of polysaccharides have been phased out?
What is the answer?
ANS:
unanswerable