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The Oregon Trail : Sketches of Prairie and Rocky-Mountain Life ( also published as The California & Oregon Trail ) is a book written by Francis Parkman .
 person: Francis Parkman
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Francis Parkman