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Khieu Samphan  head of state of the former  Democratic Kampuchea  ( DK ) arrived here around 11 : 50 a. m. local time ( 0450 GMT ) on Wednesday for medical treatment on a helicopter arranged by Prime Minister Hun Sen .
 employee of: Khieu Samphan, Democratic Kampuchea
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:  Khieu Samphan, Democratic Kampuchea 
Answer:
 employee of: Khieu Samphan, Democratic Kampuchea