204435
The Postal Service established a post office on June 1 , 1903 , in what was then Atoka County , Choctaw Nation , Indian Territory .
 organization: Postal Service; location: Atoka
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: Postal Service, Atoka 
Answer:
 organization: Postal Service; location: Atoka