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Chestnut , manning a metal detector , was caught unaware by Weston , who shot Chestnut through the back of the head at point-blank range , killing him instantly .
 Chestnut, Chestnut
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chestnut, Chestnut