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He then worked at the Stanford Linear Accelerator Center , the Institute for Advanced Study in Princeton , and the Center for Science and International Affairs at Harvard ’s Kennedy School of Government .
 Stanford Linear Accelerator Center, Institute for Advanced Study, Kennedy School of Government
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Stanford Linear Accelerator Center, Institute for Advanced Study, Kennedy School of Government