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He appeared twice on CBS 's The Millionaire fantasy drama in 1955 and 1957 and as an announcer in the 1957 episode " Blizzard " of NBC 's The Loretta Young Show .
 organization: CBS; organization: NBC
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: CBS, NBC 
Answer:
 organization: CBS; organization: NBC