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The concept of dialectics was given new life at the start of the 19th century by Georg Wilhelm Friedrich Hegel ( following Johann Gottlieb Fichte ) , whose dialectical model of nature and of history made dialectic a fundamental aspect of the nature of reality ( instead of regarding the contradictions into which dialectics leads as a sign of the sterility of the dialectical method , as the 18th - century philosopher Immanuel Kant tended to do in his " Critique of Pure Reason " ) .
 person: Georg Wilhelm Friedrich Hegel; person: Johann Gottlieb Fichte; person: Immanuel Kant; media: Critique of Pure Reason
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: Georg Wilhelm Friedrich Hegel, Johann Gottlieb Fichte, Immanuel Kant, Critique of Pure Reason 
Answer:
 person: Georg Wilhelm Friedrich Hegel; person: Johann Gottlieb Fichte; person: Immanuel Kant; media: Critique of Pure Reason