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Long term estimates of the bombing campaign ranged from an expectation that Hanoi would rein in the Viet Cong to one of provoking Hanoi and the Viet Cong into an intensification of the war .
 location: Hanoi; organization: Viet Cong; location: Hanoi; organization: Viet Cong
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: Hanoi, Viet Cong, Hanoi, Viet Cong 
Answer:
 location: Hanoi; organization: Viet Cong; location: Hanoi; organization: Viet Cong