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Back home again and not wanting to return to the steel mills , Stephens re-enlisted in the Marine Corps , was sent to Paris as a Marine Security Guard , and became an aide to the American Ambassador , Jefferson Caffery .
 Stephens, Marine Corps, Marine Security, Jefferson Caffery
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Stephens, Marine Corps, Marine Security, Jefferson Caffery