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In the " Critique of Pure Reason " ( 1781 ) , Immanuel Kant argued that the categories are part of our own mental structure and consist of a set of " a priori " concepts through which we interpret the world around us .
 media: Critique of Pure Reason; person: Immanuel Kant
Please list all entity words in the text that fit the category.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} 
Answer:
 media: Critique of Pure Reason; person: Immanuel Kant