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In later years of Qapaghan , he had to fight four battles in a year starting from 714 , resubduing tribes and nearly was killed in an ambush from Uyghur forces in 716 .
 Qapaghan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Qapaghan