63787
He mocked controversial NBC president Fred Silverman as " a total unequivocal failure " and displayed a chart showing the poor ratings of NBC programs .
 organization: NBC; person: Fred Silverman; 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: NBC, Fred Silverman, NBC 
Answer:
 organization: NBC; person: Fred Silverman; organization: NBC