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They officially stayed in Buckingham Palace throughout the war , although they usually spent nights at Windsor Castle .
 location: Buckingham Palace; location: Windsor Castle
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: Buckingham Palace, Windsor Castle 
Answer:
 location: Buckingham Palace; location: Windsor Castle