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Willem Ferdinand van Rheede van Oudtschoorn Bergh ( 2 November 1906 – 28 May 1973 ) , better known as " Ferdie " Bergh , was a South African rugby union player .
 Bergh, Ferdie, Bergh
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bergh, Ferdie, Bergh