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He was previous Assistant and then Associate Professor there , and before that , Instructor at the California Institute of Technology He was visting professor at Institut d’études politiques de Paris in 2008 .
 California Institute of Technology, Institut d’études politiques de Paris
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 California Institute of Technology, Institut d’études politiques de Paris