Narrative poems tell a story with characters, plot, setting, and theme. Ballads are a form of narrative poem passed down orally that also have rhythm and sometimes rhyme. Characteristics of ballads include dealing with the supernatural or heroics, having a tragic outcome, presenting a single dramatic episode, including dialogue and gaps requiring inference, using short stanzas in a clear rhyme scheme often with a refrain. Due to their rhyme and rhythm, ballads are often set to music.