66768
The two principal Slavic groups in the present-day area of Brandenburg were the Hevelli in the west and the Sprevane in the east .
 Brandenburg, Hevelli, Sprevane
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Brandenburg, Hevelli, Sprevane