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On relinquishing command General Petras was posted to Land Force Central Area Headquarters , where he served in strategic planning , the Director of the Militia Officer Training School , responsible for all officer staff training , Deputy Chief of Staff ( Operations ) and Deputy Commander of Land Force Central Area .
 person: Petras
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: Petras 
Answer:
 person: Petras