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Military career Campbell joined the Army on 20 September 1786 as an ensign in the 1st Regiment of Foot Guards .
 person: Campbell; organization: 1st Regiment of Foot Guards
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: Campbell, 1st Regiment of Foot Guards 
Answer:
 person: Campbell; organization: 1st Regiment of Foot Guards