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They are monitored and supervised by a team that includes a nutritionist , a psychologist , and a physical trainer , the latter of which is former U.S. Marine Harvey Walden IV .
 U.S., Harvey Walden IV
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 U.S., Harvey Walden IV