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 Among the biggest obstacles to combating the global AIDS epidemic is the culture of silence and shame that continues to surround the disease , especially in hard-hit countries like South Africa , where the United Nations estimates that one in five adults have AIDS or are infected with H.I.V. Yesterday 's announcement by Nelson Mandela that his 54-year-old son , Makgatho , had died of AIDS was an important step toward ending a taboo that keeps many people across Africa from talking openly about the disease 's impact on them and their families , thereby hampering treatment and prevention efforts . 
 nationality: Nelson Mandela, South Africa
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
 Entity Pairs:  Nelson Mandela, South Africa 
Answer:
 nationality: Nelson Mandela, South Africa