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Battle Pir Muhammad advanced without further delay to oppose the designs of Abu Nasr Qara Yusuf and reaching a particular spot without confrontation he became aware that a detachment of the enemy sent forward by the Kara Koyunlu chief to explore and scour the country had taken post in the Qara-Derrah Pass , a strong defile in the mountains which at a subsequent period formed the boundary between the Turkish and Persian dominions .
 Abu Nasr Qara Yusuf
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Abu Nasr Qara Yusuf