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There are similar limitations in discussions of the do-unto-others golden rule , or ethical principles that are modeled on the mutuality and mutual benevolence that come out of the face-to-face relations envisaged by Emmanuel Levinas or the I-Thou relationships described by Martin Buber .
 Emmanuel Levinas, Martin Buber
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Emmanuel Levinas, Martin Buber