4660
He made his Chelsea debut , on 24 March 2010 , in a 5 – 0 away win at Portsmouth , when he replaced Yuri Zhirkov at left-back .
 organization: Chelsea; person: Yuri Zhirkov
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: Chelsea; person: Yuri Zhirkov