11967
A number of shallow rivers cross the city , including the Boyanska , Vladayska and Perlovska .
 Boyanska, Vladayska, Perlovska
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Boyanska, Vladayska, Perlovska