sentences:  The 2001 follow-up album, "Iowa", although darker in tone, made the band more popular.After a brief hiatus, Slipknot returned in 2004 with "", before going on another hiatus and returning in 2008 with its fourth album, "All Hope Is Gone", which debuted at number one on the "Billboard" 200 chart.After another long hiatus, Slipknot released its fifth studio album, "", in 2014.