63333
He received a Ph.D. from Princeton University under the supervision of John Milnor in 1965 with the dissertation " The obstruction to finding a boundary for an open manifold of dimension greater than five " .
 Princeton University, John Milnor
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Princeton University, John Milnor