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In the philosophy of mathematics , the best known form of realism about numbers is Platonic realism , which grants them abstract , immaterial existence .
 person: Platonic realism
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: Platonic realism 
Answer:
 person: Platonic realism