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After the war , Miller received his law degree from Columbia Law School in 1946 , and did postgraduate study at University of Iowa College of Law later that year .
 Miller, Columbia Law School, University of Iowa College of Law
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Miller, Columbia Law School, University of Iowa College of Law