41654
It then passed to the London Midland Region of British Railways on nationalisation in 1948 .
 organization: Midland
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: Midland 
Answer:
 organization: Midland