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They started the advance on 17 November , divisional headquarters being established at Waterloo on 21 November .
 location: Waterloo
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: Waterloo 
Answer:
 location: Waterloo