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In December 1998 , it became one of the sixteen restricted Union of Universal Postal Union .
 organization: Universal Postal Union
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: Universal Postal Union 
Answer:
 organization: Universal Postal Union