147731
The Rositza River near this town is known to hold " som " or European Catfish and some of them reach lengths of over 2 meters , especially the ones that live in the dam Alexandar Stamboliiski .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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