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He also became the editor-in-chief of the " Omaha World-Herald " , although most editorial duties were performed by Richard Lee Metcalfe and Gilbert Hitchcock .
 Richard Lee Metcalfe, Gilbert Hitchcock
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Richard Lee Metcalfe, Gilbert Hitchcock