29023
Only the fortress city of Vicksburg , Mississippi , prevented Union control of the entire river .
 location: Vicksburg; location: Mississippi; location: Union
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: Vicksburg, Mississippi, Union 
Answer:
 location: Vicksburg; location: Mississippi; location: Union