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Its history dates back to 1237 , when the Teutonic Order constructed their fortified stronghold on the banks of a nearby river .
 organization: Teutonic Order
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: Teutonic Order 
Answer:
 organization: Teutonic Order