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Kollapur region is a area spanning the Nallamala forest area on the banks of the river Krishna in the Mahbubnagar district , in the state of Andhra Pradesh India .
 Krishna, Mahbubnagar district, Andhra Pradesh
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Krishna, Mahbubnagar district, Andhra Pradesh