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In the example of a stock that has dropped because of excessive pessimism , one can see similarities to the " margin of safety " that value investor Benjamin Graham sought when purchasing stocks - essentially , being able to buy shares at a discount to their intrinsic value .
 person: Benjamin Graham
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Benjamin Graham 
Answer:
 person: Benjamin Graham