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Many non-members addressed the group , including Helen Keller , Margaret Sanger , Emma Goldman , and Amy Lowell .
 Helen Keller, Margaret Sanger, Emma Goldman, Amy Lowell
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Helen Keller, Margaret Sanger, Emma Goldman, Amy Lowell