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The 551st Signal Battalion is an active duty unit of the United States Army , housed on Fort Gordon .
 organization: 551st Signal Battalion; organization: United States Army
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: 551st Signal Battalion, United States Army 
Answer:
 organization: 551st Signal Battalion; organization: United States Army