5082
Former president Bush's Homeland Security chief Michael Chertoff played the role of National Security Advisor to the president while former Director of  National Intelligence   John Negroponte  was Secretary of State .
 employee of: National Intelligence, John Negroponte
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 employee of: National Intelligence, John Negroponte