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She and her husband , Nathaniel Branden , were leading figures in the Objectivist movement based on Rand 's philosophy of Objectivism , and they operated the Nathaniel Branden Institute to promote Objectivism .
 Nathaniel Branden, Rand, Nathaniel Branden Institute
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Nathaniel Branden, Rand, Nathaniel Branden Institute