7970
In 1929 , he briefly became a " Privatdozent " at the University of Hamburg , where the prospects of becoming a tenured professor were better , but in October of that year a better offer presented itself when he was invited to Princeton University .
 organization: University of Hamburg; organization: Princeton University
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 organization: University of Hamburg; organization: Princeton University