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Among his interview guests were Martin Luther King Jr. and Sen. Robert F. Kennedy .
 person: Martin Luther King Jr.; person: Robert F. Kennedy
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:
 person: Martin Luther King Jr.; person: Robert F. Kennedy