227075
Eugene Botes ( born June 19 , 1980 in Vanderbijlpark ) is a retired South African swimmer , who specialized in butterfly events .
 Vanderbijlpark
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Vanderbijlpark