Problem: Who is generally considered to have invented the first electric battery cell in 1800?
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A: alessandro volta

Problem: What ball is worth three points in snooker?
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A: green

Problem: Known affectionately as 'The Hungarian Sea' and one of the country's major tourist attractions, which is the largest lake in Central Europe?
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A: lake balaton

Problem: What is the surname of rowing brothers Greg and Jonny, who won Olympic Gold Medals in 1992?
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A:
searle