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Ivanhoe was a BBC television series from 1970 , based on Sir Walter Scott 's novel of the same name .
 person: Walter Scott
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Walter Scott 
Answer:
 person: Walter Scott