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One of the most prominent battles was 1688 's Siege of Bangkok , when tens of thousands of Siamese forces spent four months besieging a French fortress within the city .
 location: Bangkok
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: Bangkok 
Answer:
 location: Bangkok