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There , he studied more method acting technique with founding member Robert Lewis , and with other students including Marlon Brando , Montgomery Clift , Herbert Berghof , Sidney Lumet , and his soon-to-be wife , Anne Jackson .
 Robert Lewis, Marlon Brando, Montgomery Clift, Herbert Berghof, Sidney Lumet, Anne Jackson
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:
 Robert Lewis, Marlon Brando, Montgomery Clift, Herbert Berghof, Sidney Lumet, Anne Jackson