12686
Although Christie , who is not racing the individual 100 metres in Berlin , took his time to agree to run , the veteran was clearly delighted to be part of the tribute to the black American .
 American, Christie, Berlin
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:
 American, Christie, Berlin