Problem: England national football team:

England is quite a successful nation at the UEFA European Football Championship, having finished in third place in 1968 and reached the semi-final in 1996. England hosted Euro 96 and have appeared in eight UEFA European Championship Finals tournaments, tied for ninth-best. The team has also reached the quarter-final on two recent occasions in 2004 and 2012. The team's worst result in the competition was a first-round elimination in 1980, 1988, 1992 and 2000. The team did not enter in 1960, and they failed to qualify in 1964, 1972, 1976, 1984, and 2008.

Who hosted the UEFA European Football Championship in 1968?
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A: unanswerable

Problem: Everton hold the record for the most seasons in England's top tier (Division One/Premier League), at 111 seasons out of 114 as of 201415 (the club played in Division 2 in 193031 and from 195154). They are one of seven teams to have played all 22 seasons of the Premier League since its inception in August 1992 the others being Arsenal, Aston Villa, Chelsea, Liverpool, Manchester United, and Tottenham Hotspur. Everton against Aston Villa is the most played fixture in England's top flight, as of the 201213 season the two founder members of the Football League have played a record 196 league games.
How many other teams have played all 22 seasons in the Premier League since its inception?
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Answer: seven

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Alternatives to pesticides are available and include methods of cultivation, use of biological pest controls (such as pheromones and microbial pesticides), genetic engineering, and methods of interfering with insect breeding. Application of composted yard waste has also been used as a way of controlling pests. These methods are becoming increasingly popular and often are safer than traditional chemical pesticides. In addition, EPA is registering reduced-risk conventional pesticides in increasing numbers.
How well do insects breed in your yard when you use a yard waste bin?
A: unanswerable

Context and question: To make pulp from wood, a chemical pulping process separates lignin from cellulose fibres. This is accomplished by dissolving lignin in a cooking liquor, so that it may be washed from the cellulose; this preserves the length of the cellulose fibres. Paper made from chemical pulps are also known as wood-free papersnot to be confused with tree-free paper; this is because they do not contain lignin, which deteriorates over time. The pulp can also be bleached to produce white paper, but this consumes 5% of the fibres; chemical pulping processes are not used to make paper made from cotton, which is already 90% cellulose.
What percentage of cotton is not cellulose?
Answer: unanswerable

Question: Cesare Beccaria, a jurist and one of the great Enlightenment writers, became famous for his masterpiece Of Crimes and Punishments (1764), which was later translated into 22 languages. Another prominent intellectual was Francesco Mario Pagano, who wrote important studies such as Saggi Politici (Political Essays, 1783), one of the major works of the Enlightenment in Naples, and Considerazioni sul processo criminale (Considerations on the criminal trial, 1787), which established him as an international authority on criminal law.
Is there an answer to this question: In what year did Francesco Mario Pagano publish Saggi Politici?

Answer: 1783

Problem: Catalan language:

With the union of the crowns of Castille and Aragon (1479), the use of Spanish gradually became more prestigious. Starting in the 16th century, Catalan literature experienced a decline, the language came under the influence of Spanish, and the urban and literary classes became bilingual.

When did Catalan literature begin a downward trend?
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A:
16th century