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Aboard the helicopters were  Venezuela  's interior minister Ramon Rodriguez Chacin and close  Chavez  collaborator Colombian Sen. Piedad Cordoba as well as four Red Cross representatives and doctors .
 None
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 None