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Silas Kipruto ( born 26 September 1984 ) is a Kenya n long-distance runner who specializes in the half marathon and 10K run events , with personal bests of 27:28 minutes and 59:39 minutes respectively .
 Silas Kipruto, Kenya
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Silas Kipruto, Kenya