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Reflection on Cambodian History Up to the Era of  Democratic Kampuchea  published last week offers a preview of what  Khieu Samphan  might offer as a defense before the tribunal .
 employee of: Democratic Kampuchea, 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:  Democratic Kampuchea, Khieu Samphan 
Answer:
 employee of: Democratic Kampuchea, Khieu Samphan