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Rudolf Carnap ( in his earlier work ) and Willard Van Orman Quine were prominent proponents of this view .
 person: Rudolf Carnap; person: Willard Van Orman Quine
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: Rudolf Carnap, Willard Van Orman Quine 
Answer:
 person: Rudolf Carnap; person: Willard Van Orman Quine