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In contrast with the " big-A anarchism " of the classical era , the newly coined term " small-a anarchism " signals their tendency not to base their thoughts and actions on classical-era anarchism or to refer to classical anarchists such as Peter Kropotkin and Pierre-Joseph Proudhon to justify their opinions .
 person: Peter Kropotkin; person: Pierre-Joseph Proudhon
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:
 person: Peter Kropotkin; person: Pierre-Joseph Proudhon