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He also performed with Kel Mitchell at a charity show in June 2008 , and in November 2009 he opened for Nigel Lawrence at Boston University 's BU Central .
 Kel Mitchell
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kel Mitchell