Problem: 2008 Sichuan earthquake:

According to a study by the China Earthquake Administration (CEA), the earthquake occurred along the Longmenshan fault, a thrust structure along the border of the Indo-Australian Plate and Eurasian Plate. Seismic activities concentrated on its mid-fracture (known as Yingxiu-Beichuan fracture). The rupture lasted close to 120 sec, with the majority of energy released in the first 80 sec. Starting from Wenchuan, the rupture propagated at an average speed of 3.1 kilometers per second 49 toward north east, rupturing a total of about 300 km. Maximum displacement amounted to 9 meters. The focus was deeper than 10 km.

How deep was the focus of the earthquake?
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A: 10 km

Problem: Middle Ages:

Legal studies advanced during the 12th century. Both secular law and canon law, or ecclesiastical law, were studied in the High Middle Ages. Secular law, or Roman law, was advanced greatly by the discovery of the Corpus Juris Civilis in the 11th century, and by 1100 Roman law was being taught at Bologna. This led to the recording and standardisation of legal codes throughout Western Europe. Canon law was also studied, and around 1140 a monk named Gratian (fl. 12th century), a teacher at Bologna, wrote what became the standard text of canon lawthe Decretum.

What is another name for Roman law?
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A: Secular law

Problem: Somalis:

Alongside Barre, the Supreme Revolutionary Council (SRC) that assumed power after President Sharmarke's assassination was led by Lieutenant Colonel Salaad Gabeyre Kediye and Chief of Police Jama Korshel. The SRC subsequently renamed the country the Somali Democratic Republic, dissolved the parliament and the Supreme Court, and suspended the constitution.

Along with dissolving the Supreme Court and parliament, what action did the Supreme Revolutionary Council take?
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A: suspended the constitution

Problem: Buckingham Palace:

Before Prince Albert's death, the palace was frequently the scene of musical entertainments, and the greatest contemporary musicians entertained at Buckingham Palace. The composer Felix Mendelssohn is known to have played there on three occasions. Johann Strauss II and his orchestra played there when in England. Strauss's "Alice Polka" was first performed at the palace in 1849 in honour of the queen's daughter, Princess Alice. Under Victoria, Buckingham Palace was frequently the scene of lavish costume balls, in addition to the usual royal ceremonies, investitures and presentations.

Queen Victoria hosted which type of balls?
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A:
lavish costume balls