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Trondheim og omland is an economic region in Sør-Trøndelag county , Norway .
 Trondheim, Sør-Trøndelag, Norway
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Trondheim, Sør-Trøndelag, Norway