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In November 2009 , photographs surfaced on the internet which appeared to show " N. " thorelii " in its natural habitat in Vietnam , growing at 0 – 200 " m above sea level .
 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