51944
The capital was Hanoi ( Tonkin ) , with the exception of a few decades in Saigon ( in Cochinchina ) .
 Hanoi, Tonkin, Saigon, Cochinchina
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, Tonkin, Saigon, Cochinchina