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James Lincoln Leighton ( born February 12 , 1964 , New Haven , CT ) is a Professor of Chemistry in the Department of Chemistry at Columbia University .
 Leighton, Columbia University
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Leighton, Columbia University