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Khieu Samphan  ( born July 27 1931 ) was the president of the state presidium of  Democratic Kampuchea  ( Cambodia ) from 1976 until 1979 .
 Khieu Samphan, Democratic Kampuchea
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:
 Khieu Samphan, Democratic Kampuchea