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He was employed by NBC News for 28 years and previously worked for ABC News , CBS News , and Visnews .
 organization: NBC News; organization: ABC News; organization: CBS News
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: NBC News, ABC News, CBS News 
Answer:
 organization: NBC News; organization: ABC News; organization: CBS News