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It said heavy fighting started at midnight in the region dividing the two warring factions , with the PUK aiming to break through to KDP 's headquarters in Salahuddin .
 KDP, Salahuddin, PUK
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 KDP, Salahuddin, PUK