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Barnes attended the private Ivy League research university Yale University from 1992-1996 in pursuit of his undergraduate degree in History , but left in protest after Yale University announced it plans to discriminate against applicants who did not have familial ties to the university or lack of income .
 Barnes, Ivy League, Yale University, Yale
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Barnes, Ivy League, Yale University, Yale