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His gravesite was unmarked until 1951 , when Cincinnati Reds President Warren Giles launched a successful campaign to place a marker , a monument that currently stands .
 Cincinnati Reds, Warren Giles
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cincinnati Reds, Warren Giles