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The ground breaking ceremony was conducted by Sam Nujoma , the then Chancellor of the University of Namibia at Ongwediva on 17 November 2007 .
 Sam Nujoma, Namibia, Ongwediva
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sam Nujoma, Namibia, Ongwediva