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The term " medieval popular Bible " became established in scholarship relatively recently as a result of the writings of Brian O. Murdoch , though the phrase had been used before him , usually in a less clearly defined way .
 person: Brian O. Murdoch
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: Brian O. Murdoch