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With the failure of the Pan-Green Coalition to win a majority  President   Chen Shui-bian  found it difficult as in the past to enact his policies .
 President, Chen Shui-bian
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:
 President, Chen Shui-bian