74799
They became three old friends who grew up in the same small industrial town and worked in the same steel mill , and in due course were drafted together to Vietnam .
 location: Vietnam
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: Vietnam 
Answer:
 location: Vietnam