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He has spent time with Greg Jackson 's , Renzo Gracie in New York and with the Ricardo Almeida New Jersey team .
 Greg Jackson, Renzo Gracie, Ricardo Almeida
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Greg Jackson, Renzo Gracie, Ricardo Almeida