120528
Sperzel did postgraduate work at the University of Pennsylvania School of Veterinary Medicine and in 1962 he was awarded a Master 's Degree in radiation biology by the Graduate School of Medicine and Dentistry at the University of Rochester .
 University of Pennsylvania, University of Rochester
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 University of Pennsylvania, University of Rochester