Prometheus the race of women and female kind: of her is the deadly race and tribe of women who live amongst mortal men to their great trouble, no helpmeets in hateful poverty, but only in wealth" (590–594). Prometheus is chained to a rock in the Caucasus for eternity, where his liver is eaten daily by an eagle, only to be regenerated by night, due to his immortality. The eagle is a symbol of Zeus himself. Years later, the Greek hero Heracles (Hercules) slays the eagle and frees Prometheus from his torment (520–528). Hesiod revisits the story of Prometheus and the theft
Chained to the Rhythm that contains a midtempo beat. Perry co-wrote the track with Marley, Sia Furler, and its producers Max Martin and Ali Payami. It has a length of three minutes and fifty-seven seconds. The song contains "slap bass" with elements of electric guitar and synths. It features a guest appearance from Marley and background vocals from Furler. According to the sheet music published by Kobalt Music Publishing America, Inc on Musicnotes.com, "Chained to the Rhythm" is in A minor set in a time signature at a moderate tempo of 95 beats per minute. Perry's vocal range spans from the low note B