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Today 's Olympics-wheels-coming-off story : London 2012 : Olympic watchdog member quits over Dow links http://t.co/RNXZ8tmR
 London, Olympic watchdog, Dow
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 London, Olympic watchdog, Dow