61773
At the time , the university had no faculty of astronomy , so in 1932 it formed a collaboration with Otto Struve at the University of Chicago , who supplied astronomers .
 person: Otto Struve; organization: University of Chicago
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Otto Struve, University of Chicago 
Answer:
 person: Otto Struve; organization: University of Chicago