7652
Some of the music includes Blues , Country , Jazz , '20s and '30s , Doo-Wop , A cappella , Soul , Rhythm and Blues , Beautiful Music , and Polka .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None