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A close confidant of Pol Pot the  Khmer Rouge  leader who died in 1998 since their student days in France Mr.  Khieu Samphan  has denied responsibility for the Khmer Rouge's acts saying he learned of the atrocities committed by his regime only when he saw a documentary about Tuol Sleng in 2003 .
 employee of: Khmer Rouge, Khieu Samphan
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Khmer Rouge, Khieu Samphan 
Answer:
 employee of: Khmer Rouge, Khieu Samphan