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On May 5 , 10 hostages held by the FARC were killed during an attempt to rescue them by the army .
 the FARC, the army, 10 hostages held by the FARC, them
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 the FARC, the army, 10 hostages held by the FARC, them