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Being the fifth seed , they first defeated their second seed compatriots Xu Chen and Guo Zhendong 21 – 11 , 21 – 16 in the quarterfinals .
 person: Xu Chen; person: Guo Zhendong
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Xu Chen, Guo Zhendong 
Answer:
 person: Xu Chen; person: Guo Zhendong