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He served as a research associate and John A. McCone Postdoctoral Scholar in the Division of Mathematics , Physics and Astronomy at the California Institute of Technology from 1997 to 2000 .
 John A. McCone, California Institute of Technology
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 John A. McCone, California Institute of Technology