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As part of a trial that started in the 2009 – 10 UEFA Europa League , two extra officials – one behind each goal – were used in all matches of the competition from the play-off round .
 organization: UEFA
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: UEFA 
Answer:
 organization: UEFA