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Joan Ridder Challinor is the former chairperson of the National Commission on Libraries and Information Science in the United States .
 Joan, Challinor, National Commission on Libraries and Information Science, United States
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Joan, Challinor, National Commission on Libraries and Information Science, United States