145589
He has also taught at Carnegie Mellon University , the University of Chicago , and the University of Pennsylvania .
 Carnegie Mellon University, University of Chicago, University of Pennsylvania
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Carnegie Mellon University, University of Chicago, University of Pennsylvania