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On the first of April 2008  Ian Khama  ascended to the presidency as the fourth President of the Republic of  Botswana  as a result relinquishing his chairmanship of the Botswana Democratic Party .
 Ian Khama, Botswana
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:
 Ian Khama, Botswana