3317
Following privatisation the bridge passed into the custodianship of Railtrack and it is currently the responsibility of Network Rail .
 organization: Railtrack; 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: Railtrack; organization: Network Rail