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The Apprentice is a novel by Lewis Libby , former Chief of Staff to U.S. Vice President Dick Cheney , first published in hardback in 1996 , reprinted in trade paperback in 2002 , and reissued in mass market paperback in 2005 after Libby 's indictment in the CIA leak grand jury investigation .
 person: Lewis Libby; location: U.S.; person: Dick Cheney; person: Libby
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: Lewis Libby, U.S., Dick Cheney, Libby 
Answer:
 person: Lewis Libby; location: U.S.; person: Dick Cheney; person: Libby