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Aoki , the elder brother of reigning 125cc world champion Haruchika , had a race-long duel with John Kocinski of the United States on a Ducati before taking the chequered flag .
 Ducati, Haruchika, John Kocinski, Aoki, United States
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Ducati, Haruchika, John Kocinski, Aoki, United States