30147
Record sales declined during the Great Depression , but radio became a popular source of entertainment , and " barn dance " shows featuring country music were started by radio stations all over the South , as far north as Chicago , and as far west as California .
 South, Chicago, California
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 South, Chicago, California