Problem: Economy of Greece:

In terms of ship categories, Greek companies have 22.6% of the world's tankers and 16.1% of the world's bulk carriers (in dwt). An additional equivalent of 27.45% of the world's tanker dwt is on order, with another 12.7% of bulk carriers also on order. Shipping accounts for an estimated 6% of Greek GDP, employs about 160,000 people (4% of the workforce), and represents 1/3 of the country's trade deficit. Earnings from shipping amounted to €14.1 billion in 2011, while between 2000 and 2010 Greek shipping contributed a total of €140 billion (half of the country's public debt in 2009 and 3.5 times the receipts from the European Union in the period 2000–2013). The 2011 ECSA report showed that there are approximately 750 Greek shipping companies in operation.

How many Greek shipping companies were in operation in 2011?
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A: 750


Problem: Approximately 26,000 citizen soldiers, sailors, and airmen and women, trained to the level of and interchangeable with their Regular Force counterparts, and posted to CAF operations or duties on a casual or ongoing basis, make up the Primary Reserve. This group is represented, though not commanded, at NDHQ by the Chief of Reserves and Cadets, who is usually a major general or rear admiral, and is divided into four components that are each operationally and administratively responsible to its corresponding environmental command in the Regular Force – the Naval Reserve (NAVRES), Land Force Reserve (LFR), and Air Reserve (AIRRES) – in addition to one force that does not fall under an environmental command, the Health Services Reserve under the Canadian Forces Health Services Group.
Who won't command the reserves?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Bird migration is primarily, but not entirely, a Northern Hemisphere phenomenon. This is because land birds in high northern latitudes, where food becomes scarce in winter, leave for areas further south (including the Southern Hemisphere) to overwinter, and because the continental landmass is much larger in the Northern Hemisphere. In contrast, among (pelagic) seabirds, species of the Southern Hemisphere are more likely to migrate. This is because there is a large area of ocean in the Southern Hemisphere, and more islands suitable for seabirds to nest.
In which hemisphere does bird migration primarily happen?
A: Northern


Context and question: Shortly after the French Revolution (1789), the French First Republic prohibited official use of, and enacted discriminating policies against, the nonstandard languages of France (patois), such as Catalan, Alsatian, Breton, Occitan, Flemish, and Basque.
What are French non standard languages called?
Answer: patois


Question: Exchanging "+" and "−" in the expression, i.e. permuting the two solutions of the equation can be viewed as a (very simple) group operation. Similar formulae are known for cubic and quartic equations, but do not exist in general for degree 5 and higher. Abstract properties of Galois groups associated with polynomials (in particular their solvability) give a criterion for polynomials that have all their solutions expressible by radicals, i.e. solutions expressible using solely addition, multiplication, and roots similar to the formula above.
Is there an answer to this question: What are used to express the solutions of polynomials?

Answer: radicals


Question: After Laporta's departure from the club in June 2010, Sandro Rosell was soon elected as the new president. The elections were held on 13 June, where he got 61.35% (57,088 votes, a record) of total votes. Rosell signed David Villa from Valencia for €40 million and Javier Mascherano from Liverpool for €19 million. In November 2010, Barcelona defeated their main rival, Real Madrid 5–0 in El Clásico. In the 2010–11 season, Barcelona retained the La Liga trophy, their third title in succession, finishing with 96 points. In April 2011, the club reached the Copa del Rey final, losing 1–0 to Real Madrid at the Mestalla in Valencia. In May, Barcelona defeated Manchester United in the 2011 Champions League Final 3–1 held at Wembley Stadium, a repeat of the 2009 final, winning their fourth European Cup. In August 2011, La Masia graduate Cesc Fàbregas was bought from Arsenal and he would help Barcelona defend the Spanish Supercup against Real Madrid. The Supercup victory brought the total number of official trophies to 73, matching the number of titles won by Real Madrid.
Is there an answer to this question: How much did Barcelona pay to sign  David Villa?

Answer:
€40 million