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According to University of Toronto researcher David Westaway , another team of scientists last year took the first step toward an Alzheimer ' s vaccine .
 organization: University of Toronto; person: University of Toronto researcher; person: University of Toronto researcher David Westaway; person: another team of scientists; person: scientists
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
 Entities: University of Toronto, University of Toronto researcher, University of Toronto researcher David Westaway, another team of scientists, scientists 
Answer:
 organization: University of Toronto; person: University of Toronto researcher; person: University of Toronto researcher David Westaway; person: another team of scientists; person: scientists