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Career Lewis started his career as a youth player at Chelsea and Reading before joining Cheltenham Town for the 2007 – 08 season .
 Lewis, Chelsea, Reading, Cheltenham Town
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lewis, Chelsea, Reading, Cheltenham Town