Problem: PlayStation 3:

Sony confirmed that there was an error and stated that they were narrowing down the issue and were continuing to work to restore service. By March 2 (UTC), 2010, owners of original PS3 models could connect to PSN successfully and the clock no longer showed December 31, 1999. Sony stated that the affected models incorrectly identified 2010 as a leap year, because of a bug in the BCD method of storing the date. However, for some users, the hardware's operating system clock (mainly updated from the internet and not associated with the internal clock) needed to be updated manually or by re-syncing it via the internet.

What clock unrelated to the error in the PS2 had to be updated in some cases in order to fix the bug?
---
A: unanswerable


Problem: Department store:

Selfridges was established in 1909 by American-born Harry Gordon Selfridge on Oxford Street. The company's innovative marketing promoted the radical notion of shopping for pleasure rather than necessity and its techniques were adopted by modern department stores the world over. The store was extensively promoted through paid advertising. The shop floors were structured so that goods could be made more accessible to customers. There were elegant restaurants with modest prices, a library, reading and writing rooms, special reception rooms for French, German, American and "Colonial" customers, a First Aid Room, and a Silence Room, with soft lights, deep chairs, and double-glazing, all intended to keep customers in the store as long as possible. Staff members were taught to be on hand to assist customers, but not too aggressively, and to sell the merchandise. Selfridge attracted shoppers with educational and scientific exhibits; – in 1909, Louis Blériot's monoplane was exhibited at Selfridges (Blériot was the first to fly over the English Channel), and the first public demonstration of television by John Logie Baird took place in the department store in 1925.

Who closed Selfridges in 1909?
---
A: unanswerable


Problem: Aircraft carrier:

Since World War II, aircraft carrier designs have increased in size to accommodate a steady increase in aircraft size. The large, modern Nimitz class of US carriers has a displacement nearly four times that of the World War II–era USS Enterprise, yet its complement of aircraft is roughly the same—a consequence of the steadily increasing size and weight of military aircraft over the years. Today's aircraft carriers are so expensive that nations which operate them risk significant political, economic, and military impact if a carrier is lost, or even used in conflict.

Which era does the USA Enterprise belong to?
---
A: unanswerable


Problem: Samoa:

Britain also sent troops to protect British business enterprise, harbour rights, and consulate office. This was followed by an eight-year civil war, during which each of the three powers supplied arms, training and in some cases combat troops to the warring Samoan parties. The Samoan crisis came to a critical juncture in March 1889 when all three colonial contenders sent warships into Apia harbour, and a larger-scale war seemed imminent. A massive storm on 15 March 1889 damaged or destroyed the warships, ending the military conflict.

What interests were Samoans trying to protect?
---
A:
unanswerable