47767
According to a group of astronomers at the University of Toronto and elsewhere , the observations of this supernova are best explained by assuming that it arose from a white dwarf that had grown to twice the mass of the Sun before exploding .
 organization: University of Toronto; astronomical object: Sun
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: University of Toronto, Sun 
Answer:
 organization: University of Toronto; astronomical object: Sun