Question: What are both Quietdrive and Supergrass?
Related documents: [0]  [DOC] Supergrass were an English rock band, formed in 1993 in Oxford. The band consisted of brothers Gaz (guitar and lead vocals) and Rob Coombes (keyboards and backing vocals), Mick Quinn (bass and backing vocals) and Danny Goffey (drums and backing vocals). [END] 
[1]  [DOC] Quietdrive is an alternative rock band based in Hopkins, Minnesota that formed in 2002. Quietdrive released their debut album "When All That's Left Is You" on May 30, 2006 on Epic Records. In April 2008, Quietdrive parted with Epic Records and released their album titled "Deliverance" on October 14, 2008 with the Militia Group. In 2009 they parted with Militia Group and released their independent EP titled "Close Your Eyes" on their own independent record label Sneaker 2 Bombs Records. Their third full-length album, titled "Quietdrive", debuted on December 14, 2010 and their full-length album, titled "Up or Down", on April 24, 2012. The band's most recent release was "The Ghost of What You Used to Be", which was released on December 16, 2014. [END] 
Answer: 
rock band
rock band