21038
Each colony had a long-established system of local militia , combat tested in support of British regulars thirteen years before to secure an expanded British Empire .
 location: British Empire
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: British Empire 
Answer:
 location: British Empire