In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

[Q]: 47 countries are currently participating in the Blue Flag Programme: Bahamas, Belgium, Brazil, Bulgaria, Canada, Croatia, Cyprus, Denmark, Dominican Republic, England, Estonia, France, Germany, Greece, Iceland, Ireland, Israel, Italy, Jordan, Latvia, Lithuania, Malta, Mexico, Montenegro, Morocco, Netherlands, New Zealand, Northern Ireland, Norway, Poland, Portugal, Puerto Rico, Romania, Serbia, Sint Marteen, Scotland, Slovenia, South Africa, Spain, Sweden, Tunisia, Trinidad and Tobago, Turkey, United Arab Emirates, Ukraine, US Virgin Islands and Wales.
[A]: who is involved in the blue flag program

[Q]: The disaster began during a systems test on 26 April 1986 at reactor 4 of the Chernobyl plant near Pripyat and in proximity to the administrative border with Belarus and the Dnieper River. There was a sudden and unexpected power surge. When an emergency shutdown was attempted, a much larger spike in power output occurred. The second spike led to a reactor vessel rupture and a series of steam explosions. These events exposed the graphite moderator of the reactor to air, causing it to ignite. The resulting fire sent week long plumes of highly radioactive fallout into the atmosphere over an extensive geographical area, including Pripyat. The plumes drifted over large parts of the western Soviet Union and Europe. According to official post-Soviet data, about 60% of the fallout landed in Belarus.
[A]: what caused the nuclear disaster in chernobyl ukraine

[Q]: In economics and particularly in industrial organization, market power is the ability of a firm to profitably raise the market price of a good or service over marginal cost. In perfectly competitive markets, market participants have no market power. A firm with total market power can raise prices without losing any customers to competitors. Market participants that have market power are therefore sometimes referred to as 'price makers' or 'price setters', while those without are sometimes called 'price takers'. Significant market power occurs when prices exceed marginal cost and long run average cost, so the firm makes profit.
[A]:
who controls the market in a competitive market