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Early arguments against the utilization of central economic planning for a socialist economy were brought up by proponents of decentralized economic planning or market socialism , including Pierre-Joseph Proudhon , Peter Kropotkin and Leon Trotsky .
 person: Pierre-Joseph Proudhon; person: Peter Kropotkin; person: Leon Trotsky
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: Pierre-Joseph Proudhon, Peter Kropotkin, Leon Trotsky 
Answer:
 person: Pierre-Joseph Proudhon; person: Peter Kropotkin; person: Leon Trotsky