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However , in September 2014 , Network Rail was reclassified as a central government body , adding around £ 34 " billion to public sector net debt .
 organization: Network Rail
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: Network Rail