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The film follows Daniel Ellsberg and explores the events leading up to the publication of the Pentagon Papers , which exposed the top-secret military history of the United States involvement in Vietnam .
 person: Daniel Ellsberg
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: Daniel Ellsberg 
Answer:
 person: Daniel Ellsberg