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Polls opened in Cambodia on Sunday for legislative elections widely expected to extend  Prime Minister   Hun Sen  's 23-year grip on power .
 title of person: Prime Minister, Hun Sen
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:  Prime Minister, Hun Sen 
Answer:
 title of person: Prime Minister, Hun Sen