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Viljoen broke with other right-wing whites in 1994 by taking part in the country 's first all-race elections in April of that year , saying the only way to attain self-determination was by cooperating with President Nelson Mandela 's majority African National Congress .
 person: Nelson Mandela; person: Viljoen; organization: African National Congress
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 person: Nelson Mandela; person: Viljoen; organization: African National Congress