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He is a professor emeritus at the Stanford Linear Accelerator Center ( SLAC ) and a senior fellow at Stanford University 's Hoover Institution .
 organization: Stanford Linear Accelerator Center; organization: Stanford University; organization: Hoover Institution
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: Stanford Linear Accelerator Center, Stanford University, Hoover Institution 
Answer:
 organization: Stanford Linear Accelerator Center; organization: Stanford University; organization: Hoover Institution