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History Benjamin Graham and David Dodd , founders of value investing , coined the term margin of safety in their seminal 1934 book , Security Analysis .
 person: Benjamin Graham; person: David Dodd
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: Benjamin Graham, David Dodd 
Answer:
 person: Benjamin Graham; person: David Dodd