11182
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 .
 Hanoi, Viet Cong, Hanoi, Viet Cong
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hanoi, Viet Cong, Hanoi, Viet Cong