28862
The latter work includes versions of plays or poems by Tristan Bernard , Heinrich Heine , Victor Hugo , Ada Negri , Leo Tolstoy etc .
 Tristan Bernard, Heinrich Heine, Victor Hugo, Ada Negri, Leo Tolstoy
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:
 Tristan Bernard, Heinrich Heine, Victor Hugo, Ada Negri, Leo Tolstoy