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Druzhnaya Gorka ( ) is an urban locality ( an urban-type settlement ) in Gatchinsky District of Leningrad Oblast , Russia , located on the banks of the Orlinka River , south of the town of Gatchina .
 Leningrad Oblast, Russia, Gatchina
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Leningrad Oblast, Russia, Gatchina