premise: Avenged Sevenfold is an album by a band from Balboa.
hypothesis: Avenged Sevenfold ( sometimes abbreviated as A7X ) is an American heavy metal band from Huntington Beach , California , formed in 1999 . Avenged Sevenfold is the eponymous fourth studio album by American heavy metal band Avenged Sevenfold , released on October 30 , 2007 by Warner Bros. . Hail to the King is the sixth studio album by American heavy metal band Avenged Sevenfold . Nightmare is the fifth studio album by American heavy metal band Avenged Sevenfold .