76684
The aim of this massive search and destroy operation was to eradicate the so-called " Iron Triangle " , an area located in close proximity to Saigon which had become a major stronghold of the communist National Liberation Front ( NLF ) or Viet Cong .
 location: Saigon
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: Saigon 
Answer:
 location: Saigon