Complex sentence: Following disappointing sales of their sixth album, "Warning" (2000), the band took a break before recording their next album, titled "Cigarettes and Valentines", a process cut short when its master tapes were stolen.
Split into simpler sentences: Following disappointing sales of their sixth album, "Warning" (2000), the band took a small break. They later reconvened to record their next album, titled "Cigarettes and Valentines", a process cut short when its master tapes were stolen.