Question: Are both Broken Bells and Cast considered rock bands?

full_context: Document 1: The Kooks: The Kooks are an English pop rock band formed in 2004 in Brighton. The band currently consists of Luke Pritchard (vocals/rhythm guitar), Hugh Harris (lead guitar/synth), Alexis Nunez (drums), and Peter Denton (bass guitar). The original bassist was Max Rafferty, and the founding drummer was Paul Garred. The lineup of the band remained constant until the departure of Rafferty in 2008. Dan Logan served as a temporary replacement, until Peter Denton joined the band permanently in October 2008. Early in 2010, Pritchard announced the departure of drummer Paul Garred, due to a nerve problem in his arm. Late in the year, Garred rejoined for studio sessions, however Chris Prendergast played drums when the band played live. Garred finally left in November 2011 after the release of their third album, "Junk of the Heart".
Document 2: Holding On for Life: "Holding On for Life" is a song performed by American alternative rock band Broken Bells. Written by band members James Mercer and Brian Burton and produced by the latter, the song was originally recorded for the band's second studio album, "After the Disco", on which it appears as the third track. It was released as the album's lead single on November 21, 2013.
Document 3: Port of Morrow (album): Port of Morrow is the fourth studio album by American rock band The Shins. The album was released March 19, 2012, on Aural Apothecary and Columbia Records and was co-produced by Greg Kurstin and frontman James Mercer. The Shins' first studio album in five years, following the release of 2007's "Wincing the Night Away", followed major lineup changes in the group: founding members Dave Hernandez (bass, guitar), Marty Crandall (keyboards) and Jesse Sandoval (drums) departed in 2009. Mercer deemed it an "aesthetic decision" to part ways with his bandmates, and in the interim, founded side project Broken Bells with Danger Mouse.
Document 4: Meyrin Fields: Meyrin Fields is the first EP by the alternative rock band Broken Bells, made up of unreleased tracks from their debut album, "Broken Bells". The instrumental version of "An Easy Life" was originally released as the b-side of "The High Road" single, and released with the vocals on the iTunes LP edition of their self-titled album, and "Meyrin Fields" was originally the b-side of "The Ghost Inside." "Heartless Empire" was originally released as an instrumental, with strings replacing the vocals, which could be heard upon opening the music box edition of their 2010 self-titled album.
Document 5: Free (band): Free were an English rock band formed in London in 1968, best known for their 1970 signature song "All Right Now". They disbanded in 1973 and lead singer Paul Rodgers went on to become a frontman of the band Bad Company along with Simon Kirke on drums. Lead guitarist Paul Kossoff formed Back Street Crawler in 1975, but died from a pulmonary embolism at the age of 25 in 1976. Bassist Andy Fraser formed Sharks.
Document 6: Broken Bells: Broken Bells is an American indie rock band composed of artist-producer Brian Burton (better known as Danger Mouse) and James Mercer, the lead vocalist and guitarist for the indie rock band The Shins. Broken Bells compose and create as a duo, but are joined by Dan Elkan and Jon Sortland when performing live. The previous live band included Conor Oberst and the Mystic Valley Band sidemen Nate Walcott and Nik Freitas, and Jonathan Hischke and Dan Elkan, both ex-members of Hella. Following their 2010 self-titled debut album, the duo released an EP, "Meyrin Fields", in 2011 and their second studio album, "After the Disco", on February 4, 2014.
Document 7: Leave It Alone (Broken Bells song): "Leave It Alone" is a song written by James Mercer and Brian Burton of the American alternative rock band Broken Bells. It was originally recorded by the band for their second studio album, "After the Disco", where it appears as the fourth track on the album. A "Leave It Alone" promotional single was released for streaming on the Australian branch of commercial music streaming service Spotify on February 4, 2014, becoming the fourth release by the band in promotion of "After the Disco", after singles "Holding On for Life", "After the Disco" and promotional single "Perfect World". This Song can be Found in The soundtrack of the Movie Miss You Already starring Toni Collettte and Drew Berrymore. This song is now available in the gameplay Guitar Hero Live.
Document 8: Echo &amp; the Bunnymen: Echo & the Bunnymen are an English rock band formed in Liverpool in 1978. The original line-up consisted of vocalist Ian McCulloch, guitarist Will Sergeant and bassist Les Pattinson, supplemented by a drum machine. By 1980, Pete de Freitas joined as the band's drummer.
Document 9: The Style Council: The Style Council were an English band formed in 1983 by Paul Weller, the former singer, songwriter, and guitarist with the punk rock/new wave/mod revival band The Jam, and keyboardist Mick Talbot, previously a member of Dexys Midnight Runners, The Bureau and The Merton Parkas. The band enabled Weller to take a more soulful direction with his music.
Document 10: Perfect World (Broken Bells song): "Perfect World" is a song written by James Mercer and Brian Burton of the American alternative rock band Broken Bells. It was originally recorded by the band for their second studio album, "After the Disco", where it appears as the opening track on the album. A "Perfect World" promotional single was released for streaming on the Australian branch of commercial music streaming service Spotify on February 4, 2014, becoming the third release by the band in promotion of "After the Disco", after singles "Holding On for Life" and "After the Disco."
Document 11: Cast (band): Cast are an English rock band from Liverpool, formed in 1992 by John Power (vocals, guitar) and Peter Wilkinson (backing vocals, bass) after Power left The La's and Wilkinson's former band Shack had split. Following early line-ups with different guitarists and drummers, Liam "Skin" Tyson (guitar) and Keith O'Neill (drums) joined Cast in 1993.
Document 12: Joy Division: Joy Division were an English rock band formed in 1976 in Salford, Greater Manchester. Originally named Warsaw, the band consisted of singer Ian Curtis, guitarist and keyboardist Bernard Sumner, bass player Peter Hook, and drummer Stephen Morris.
Document 13: Broken Bells (album): Broken Bells is the self-titled debut album from Broken Bells, consisting of James Mercer of indie rock band The Shins with producer and multi-instrumentalist Brian Burton (aka Danger Mouse), and was released on March 9, 2010.
Document 14: Peter Hook and The Light: Peter Hook and The Light are an English rock band, formed in May 2010 by the former Joy Division and New Order bassist, Peter Hook. The band also features Hook's son Jack Bates (bass), as well as Andy Poole (keyboards) and Paul Kehoe (drums), who both played with Hook as part of Monaco, one of Hook's previous groups. From the first gigs in May 2010, Nat Wason (formerly of Haven) was the group's guitarist, however in July 2013 it was announced that Wason would be moving on, to be replaced by David Potts, another former member of Monaco.
Document 15: After the Disco (song): "After the Disco" is a song by American alternative rock band Broken Bells. Written by band members James Mercer and Brian Burton and produced by the latter, it was originally recorded by the band for their second studio album, "After the Disco", where it appears as the second track. It was released as the second single from "After the Disco" in the United Kingdom on January 7, 2014. This song also used in the 15th edition of PES, "Pro Evolution Soccer 2016" as 2nd track.
ground_truth: yes