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During the First World War it was used as a training area for Canadian troops .
 organization: First World War; organization: Canadian troops
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: First World War, Canadian troops 
Answer:
 organization: First World War; organization: Canadian troops