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Eurosong 2010 Slovakia was the first country to announce its participation in the Eurovision Song Contest 2010 , which was announced by STV on 28 March 2009 , six weeks before the 2009 Contest .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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