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The Mississippi Army Ammunition Plant was a government-owned , contractor-operated ( GOCO ) facility in Hancock County , Mississippi that was dedicated on March 31 , 1983 .
 Mississippi, Hancock County , Mississippi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mississippi, Hancock County , Mississippi