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Five strangers awake finding themselves with no memory in a world resembling the wild west. Their task is to become exempt from being killed - what the towns people refer to as being " immortal " - by killing twenty of the other inhabitants of the town under the scrutiny of the sheriff ( Jack Palance ) , otherwise they will spend their lives in slavery .
 Jack Palance
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:
 Jack Palance