33561
The presidents of Botswana , Ghana , Mozambique , Namibia and Niger visited Mr. Bush at the White House as part of the administration 's effort to promote democracy and economic development in Africa and to highlight the policies it has pursued to reduce poverty and disease there .
 Africa, Namibia; Africa, Ghana; Africa, Mozambique; Africa, Botswana
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 Africa, Namibia; Africa, Ghana; Africa, Mozambique; Africa, Botswana