60698
The Balkan Mountains form a barrier which effectively stops the cool air masses coming from the north and the warm masses from the south .
 location: Balkan Mountains
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Balkan Mountains 
Answer:
 location: Balkan Mountains