2064
In October General Philippe Pétain began a series of limited attacks at Verdun , each starting with an intense bombardment coordinated by his artillery commander General Robert Nivelle .
 person: Philippe Pétain; location: Verdun; person: Robert Nivelle
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Philippe Pétain; location: Verdun; person: Robert Nivelle