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Joan was one of the 40 college students from across the United States embarked on a bus ride from Washington , D.C. to New Orleans on May 6 – 16 , 2011 , retracing the original route of the Freedom Riders .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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