Problem: A cappella:

Present-day Christian religious bodies known for conducting their worship services without musical accompaniment include some Presbyterian churches devoted to the regulative principle of worship, Old Regular Baptists, Primitive Baptists, Plymouth Brethren, Churches of Christ, the Old German Baptist Brethren, Doukhobors the Byzantine Rite and the Amish, Old Order Mennonites and Conservative Mennonites. Certain high church services and other musical events in liturgical churches (such as the Roman Catholic Mass and the Lutheran Divine Service) may be a cappella, a practice remaining from apostolic times. Many Mennonites also conduct some or all of their services without instruments. Sacred Harp, a type of folk music, is an a cappella style of religious singing with shape notes, usually sung at singing conventions.

What is the name of the Mennonite style of singing used with shape notes?
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A: unanswerable

Problem: John, King of England:

The new peace would only last for two years; war recommenced in the aftermath of John's decision in August 1200 to marry Isabella of Angouleme. In order to remarry, John first needed to abandon Isabel, Countess of Gloucester, his first wife; John accomplished this by arguing that he had failed to get the necessary papal permission to marry Isabel in the first place as a cousin, John could not have legally wed her without this. It remains unclear why John chose to marry Isabella of Angouleme. Contemporary chroniclers argued that John had fallen deeply in love with Isabella, and John may have been motivated by desire for an apparently beautiful, if rather young, girl. On the other hand, the Angoumois lands that came with Isabella were strategically vital to John: by marrying Isabella, John was acquiring a key land route between Poitou and Gascony, which significantly strengthened his grip on Aquitaine.[nb 5]

John acquired key land between Poitou and where?
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A: Gascony

Problem: Edmund Burke:

On 4 April 1786, Burke presented the Commons with the Article of Charge of High Crimes and Misdemeanors against Hastings. The impeachment in Westminster Hall, which did not begin until 14 February 1788, would be the "first major public discursive event of its kind in England", bringing the morality and duty of imperialism to the forefront of public perception. Burke already was known for his eloquent rhetorical skills and his involvement in the trial only enhanced its popularity and significance. Burke's indictment, fuelled by emotional indignation, branded Hastings a 'captain-general of iniquity'; who never dined without 'creating a famine'; whose heart was 'gangrened to the core', and who resembled both a 'spider of Hell' and a 'ravenous vulture devouring the carcasses of the dead'. The House of Commons eventually impeached Hastings, but subsequently, the House of Lords acquitted him of all charges.

When did Hastings present his article against Burke?
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A: unanswerable

Problem: 2008 Sichuan earthquake:

The Zipingpu Hydropower Plant (simplified Chinese: ; traditional Chinese: ) located 20 km east of the epicenter was damaged. A recent inspection indicated that the damage was less severe than initially feared, and it remains structurally stable and safe. The Tulong reservoir upstream is in danger of collapse. About 2,000 troops have been allocated to Zipingpu, trying to release the pressure through spillway. In total, 391 dams, most of them small, were reported damaged by the quake.

What power plant was damaged by the earthquake?
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A:
Zipingpu Hydropower Plant