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in addition to his stop in grand rapids , bush ' s schedule for the day includes a visit to university center , michigan .
 grand rapids, university center , michigan, michigan, his, bush
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 grand rapids, university center , michigan, michigan, his, bush