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Robert Nivelle was removed from command by 15 May , replaced by General Philippe Pétain , who suspended bloody large-scale attacks .
 person: Robert Nivelle; person: Philippe Pétain
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: Robert Nivelle, Philippe Pétain 
Answer:
 person: Robert Nivelle; person: Philippe Pétain