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Hi {{USERNAME}} still waiting for you to process refund request to Air China who has already authorized the full refund of the tickets . Have mail proof . Reservation 4906787451 . Please proceed asap !
 corporation: Air China
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: group, creative work, person, event, product, location, corporation 
Text: {0} 
Answer:
 corporation: Air China