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Nevertheless , the anti-kidnapping unit 's officers did not react to the shooting , allegedly because they were not aware of the presence of the foreigners at the house , and the sound of gunfire was frequent in Grozny at night .
 Grozny
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Grozny