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The film was adapted by Leonardo Bercovici and Robert E. Sherwood from the 1928 novel of the same name by Robert Nathan .
 person: Leonardo Bercovici; person: Robert E. Sherwood; person: Robert Nathan
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Leonardo Bercovici; person: Robert E. Sherwood; person: Robert Nathan