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List of ESC Congresses The first ESC Congress was held in 1950 and from then on every 4 years until 1988 , when it became an annual event .
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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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