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Swimming in heat seven , he picked up a fourth spot by 0.15 of a second behind Serbia and Montenegro 's Milorad Čavić in 23.05 .
 Milorad Čavić
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Milorad Čavić