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On 25 July 2009 , He signed a 18-month contract with Changchun Yatai .
 organization: Changchun Yatai
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: Changchun Yatai 
Answer:
 organization: Changchun Yatai