66391
After World War I , he returned to Blackburn and reverted to his original trade as a baker .
 location: Blackburn
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: Blackburn 
Answer:
 location: Blackburn