47290
Early work on the imaging of the auroras was done in 1949 by the University of Saskatchewan using the SCR-270 radar .
 organization: University of Saskatchewan; location: SCR-270
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: University of Saskatchewan, SCR-270 
Answer:
 organization: University of Saskatchewan; location: SCR-270