30177
Subsequent to the initial blending of the two polar opposite genres , other offspring soon resulted , including Southern rock , heartland rock and in more recent years , alternative country .
 organization: Southern rock
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: Southern rock 
Answer:
 organization: Southern rock