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In 1983 he moved to Milestone Records as a premier arranger , soloist , and composer , writing for small bands including guitarist Melvin Sparks , organist Jimmy McGriff , and Dr. John .
 Milestone Records, Melvin Sparks, Jimmy McGriff, Dr. John
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Milestone Records, Melvin Sparks, Jimmy McGriff, Dr. John