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Life Sellers gained her PhD from the University of London in 1992 , having previously received a Diplôme d'Etudes Approfondies from the University of Paris ( Sorbonne ) .
 Sellers, University of London, University of Paris, Sorbonne
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sellers, University of London, University of Paris, Sorbonne