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Roger Schank at Stanford University introduced the model in 1969 , in the early days of artificial intelligence .
 person: Roger Schank; organization: Stanford University
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: Roger Schank, Stanford University 
Answer:
 person: Roger Schank; organization: Stanford University