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Federal Reserve Chair Janet Yellen testifies on the central bank 's monetary policy . LIVE here : http://t.co/f7lZS47Vsx
 Federal Reserve, Janet Yellen, LIVE
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Federal Reserve, Janet Yellen, LIVE