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Eventually , as sectorisation developed into a prelude to privatisation , the unified British Rail brand disappeared , with the notable exception of the Double Arrow symbol , which has survived to this day and serves as a generic trademark to denote railway services across Great Britain .
 organization: British Rail; location: Double Arrow; location: Great Britain
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: British Rail; location: Double Arrow; location: Great Britain