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Like Pythagoras , Empedocles believed in the transmigration of the soul / metempsychosis , that souls can be reincarnated between humans , animals and even plants .
 Pythagoras, Empedocles
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pythagoras, Empedocles