13887
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 .
 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