92031
It was n't until on 21 November 2009 when he made his first appearance of the season , coming on as a substitute in the second half , in a 2 – 2 draw against Liverpool .
 Liverpool
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Liverpool