Problem: Mandolin:

Samuel Adelstein described the Lombardi mandolin in 1893 as wider and shorter than the Neapolitan mandolin, with a shallower back and a shorter and wider neck, with six single strings to the regular mandolin's set of 4. The Lombardi was tuned C, D, A, E, B, G. The strings were fastened to the bridge like a guitar's. There were 20 frets, covering three octaves, with an additional 5 notes. When Adelstein wrote, there were no nylon strings, and the gut and single strings "do not vibrate so clearly and sweetly as the double steel string of the Neapolitan."

How many frets did the Lombardi lack?
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A: unanswerable

Problem: FA Cup:

The final has been played at the rebuilt Wembley Stadium since it opened, in 2007. The rebuilding process meant that between 2001 and 2006 they were hosted at the Millennium Stadium in Cardiff in Wales. Prior to rebuilding, the final was hosted by the original Wembley Stadium since it opened in 1923 (being originally named the Empire Stadium). One exception to this 78 year series of Empire Stadium finals (including five replays) was the 1970 replay between Leeds and Chelsea, held at Old Trafford in Manchester.

Where was the FA cup held while this stadium was built?
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A: between 2001 and 2006 they were hosted at the Millennium Stadium

Problem: The Blitz:

Much civil-defence preparation in the form of shelters was left in the hands of local authorities, and many areas such as Birmingham, Coventry, Belfast and the East End of London did not have enough shelters. The Phoney War, however, and the unexpected delay of civilian bombing permitted the shelter programme to finish in June 1940.:35 The programme favoured backyard Anderson shelters and small brick surface shelters; many of the latter were soon abandoned in 1940 as unsafe. In addition, authorities expected that the raids would be brief and during the day. Few predicted that attacks by night would force Londoners to sleep in shelters.

Why were Londoners forced to sleep in shelters?
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A: attacks by night

Problem: 2008 Sichuan earthquake:

The New York Times reported that "government officials in Beijing and Sichuan have said they are investigating the collapses. In an acknowledgment of the weakness of building codes in the countryside, the National Development and Reform Commission said on May 27 that it had drafted an amendment to improve construction standards for primary and middle schools in rural areas. Experts are reviewing the draft, the commission said." To limit protests, officials pushed parents to sign a document, which forbade them from holding protests, in exchange of money, but some who refused to sign were threatened. The payment amounts varied from school to school but were approximately the same. In Hanwang, parents were offered a package valued at 8,800 USD in cash and a per-parent pension of nearly 5,600 USD. Furthermore, officials used other methods of silencing: riot police officers broke up protests by parents; the authorities set up cordons around the schools; and officials ordered the Chinese news media to stop reporting on school collapses.

What other methods were used to break up protests?
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A:
riot police