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The family lived beside the railway line just east of Bromley South railway station from 1931 to 1939 but moved to a house on a new estate at Berkhamsted , Herts , because the electrification of the Southern Railway greatly reduced the number of steam trains passing Bromley .
 location: Bromley; location: Berkhamsted; organization: Southern Railway; location: Bromley
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: Bromley, Berkhamsted, Southern Railway, Bromley 
Answer:
 location: Bromley; location: Berkhamsted; organization: Southern Railway; location: Bromley