Problem: Extract the answer to the question from the following context. Question: A supernova is required to form what? Context: Uranium is a naturally occurring element that can be found in low levels within all rock, soil, and water. Uranium is the 51st element in order of abundance in the Earth's crust. Uranium is also the highest-numbered element to be found naturally in significant quantities on Earth and is almost always found combined with other elements. Along with all elements having atomic weights higher than that of iron, it is only naturally formed in supernovae. The decay of uranium, thorium, and potassium-40 in the Earth's mantle is thought to be the main source of heat that keeps the outer core liquid and drives mantle convection, which in turn drives plate tectonics.

A: all elements having atomic weights higher than that of iron


Problem: Extract the answer to the question from the following context. Question: When did the fighting turn into a separate nation Context: Since 1965, following clashes between the two communities, the Turkish Cypriot seats in the House remain vacant. In 1974 Cyprus was divided de facto when the Turkish army occupied the northern third of the island. The Turkish Cypriots subsequently declared independence in 1983 as the Turkish Republic of Northern Cyprus but were recognised only by Turkey. In 1985 the TRNC adopted a constitution and held its first elections. The United Nations recognises the sovereignty of the Republic of Cyprus over the entire island of Cyprus.

A: 1983


Problem: Extract the answer to the question from the following context. Question: An epidemic can be what kind of outbreak? Context: NARA also maintains the Presidential Library system, a nationwide network of libraries for preserving and making available the documents of U.S. presidents since Herbert Hoover. The Presidential Libraries include:

A: nationwide


Problem: Extract the answer to the question from the following context. Question: What was considered selling poorly for the original unit? Context: While the original Xbox sold poorly in Japan, selling just 2 million units while it was on the market (between 2002 and 2005),[citation needed] the Xbox 360 sold even more poorly, selling only 1.5 million units from 2005 to 2011. Edge magazine reported in August 2011 that initially lackluster and subsequently falling sales in Japan, where Microsoft had been unable to make serious inroads into the dominance of domestic rivals Sony and Nintendo, had led to retailers scaling down and in some cases discontinuing sales of the Xbox 360 completely.

A:
just 2 million units while it was on the market