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Canadian National Railway sold the tower prior to taking the company private in 1995 , when it decided to divest all operations not directly related to its core freight shipping businesses .
 organization: Canadian National Railway
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: Canadian National Railway 
Answer:
 organization: Canadian National Railway