81322
The " kèn bầu " ( ) is one of several types of kèn , a double reed wind instrument used in the traditional music of 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