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In the 16th century , the area around Qandahar formed a bone of contention between Ghilzai and Abdalis .
 Qandahar, Ghilzai, Abdalis
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Qandahar, Ghilzai, Abdalis