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Leighton continued his chemical studies as an NSF postdoctoral fellow with Sheldon Emery Professor Eric N. Jacobsen , also of Harvard University , developing initial methods for what became known as the Jacobsen hydrolytic kinetic resolution .
 Leighton, NSF, Eric N. Jacobsen, Harvard, Jacobsen
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, NSF, Eric N. Jacobsen, Harvard, Jacobsen