#folk_song__folk_ballad  a song that is traditionally sung by the common people of a region and forms part of their culture
  supertype:  folk_music  song
  subtype:  blues__blue  a type of folk song that originated among Black Americans at the beginning of the 20th century; has a melancholy sound from repeated use of blue notes
     subtype:  boogie-woogie__boogie  an instrumental version of the blues (especially for piano)

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