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He then characterizes several philosophies that describe and attempt to deal with this feeling of the absurd , by Martin Heidegger , Karl Jaspers , Lev Shestov , Søren Kierkegaard , and Edmund Husserl .
 Martin Heidegger, Karl Jaspers, Lev Shestov, Søren Kierkegaard, Edmund Husserl
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:
 Martin Heidegger, Karl Jaspers, Lev Shestov, Søren Kierkegaard, Edmund Husserl