Problem: Geological history of Earth:

The Earth of the early Archean (4,000 to 2,500 million years ago) may have had a different tectonic style. During this time, the Earth's crust cooled enough that rocks and continental plates began to form. Some scientists think because the Earth was hotter, that plate tectonic activity was more vigorous than it is today, resulting in a much greater rate of recycling of crustal material. This may have prevented cratonisation and continent formation until the mantle cooled and convection slowed down. Others argue that the subcontinental lithospheric mantle is too buoyant to subduct and that the lack of Archean rocks is a function of erosion and subsequent tectonic events.

What might have a very hot earth stopped from occurring?
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A: cratonisation and continent formation


Problem: Likewise the migration of Spanish-speaking Nicaraguans also began as a result of political instability during the end of the 1970s and the 1980s. The uprising of the Sandinista revolution which toppled the Somoza dictatorship in 1979 caused many Nicaraguans to migrate particularly from those opposing the Sandinistas. Throughout the 1980s with the United States supported Contra War (or Contra-revolutionary war) which continued up until 1988, and the economic collapse of the country many more Nicaraguans migrated to the United States amongst other countries. The states of the United States where most Nicaraguans migrated to include Florida, California and Texas.
When did the Contra War end?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The Federal Council constitutes the federal government, directs the federal administration and serves as collective Head of State. It is a collegial body of seven members, elected for a four-year mandate by the Federal Assembly which also exercises oversight over the Council. The President of the Confederation is elected by the Assembly from among the seven members, traditionally in rotation and for a one-year term; the President chairs the government and assumes representative functions. However, the president is a primus inter pares with no additional powers, and remains the head of a department within the administration.
What serves as the collective Head of State?
A: The Federal Council


Context and question: There is evidence of induced copper deficiency in those taking 100–300 mg of zinc daily. A 2007 trial observed that elderly men taking 80 mg daily were hospitalized for urinary complications more often than those taking a placebo. The USDA RDA is 11 and 8 mg Zn/day for men and women, respectively. Levels of 100–300 mg may interfere with the utilization of copper and iron or adversely affect cholesterol. Levels of zinc in excess of 500 ppm in soil interfere with the ability of plants to absorb other essential metals, such as iron and manganese. There is also a condition called the zinc shakes or "zinc chills" that can be induced by the inhalation of freshly formed zinc oxide formed during the welding of galvanized materials. Zinc is a common ingredient of denture cream which may contain between 17 and 38 mg of zinc per gram. There have been claims of disability, and even death, due to excessive use of these products.
Having an excess of 500ppm of zinc in soil interferes with what?
Answer: ability of plants to absorb other essential metals


Question: West, alongside his mother, founded the "Kanye West Foundation" in Chicago in 2003, tasked with a mission to battle dropout and illiteracy rates, while partnering with community organizations to provide underprivileged youth access to music education. In 2007, the West and the Foundation partnered with Strong American Schools as part of their "Ed in '08" campaign. As spokesman for the campaign, West appeared in a series of PSAs for the organization, and hosted an inaugural benefit concert in August of that year.
Is there an answer to this question: What campaign did the Kanye West Foundation partner with in 2007?

Answer: "Ed in '08"


East 1st Street begins just North of East Houston Street at Avenue A and continues to Bowery. Peretz Square, a small triangular sliver park where Houston Street, First Street and First Avenue meet marks the spot where the grid takes hold.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Which street begins just North of East Houston Street at Avenue A?
Ah, so..
East 1st Street