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

Context paragraphs:
Jason Torbert: Jason Torbert is an American musician currently in the solo project, Goddamn Electric Bill on the record label 99X/10 (founded by keyboardist Roger O'Donnell of The Cure (and previously, The Psychedelic Furs, Thompson Twins and Berlin)).  Torbert has also performed bass in several other bands, including Cigar (with Jon Sortland (The Shins, Broken Bells) and Rami Krayem) and Sing The Body Electric (with Damon DeLapaz and Adam Lewis (Fenix TX)).

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.

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."

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.

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.

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.

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.

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.

Dan Elkan: Dan Elkan (born September 7, 1978) is an American singer-songwriter and producer, who is best known as the singer and guitarist for the rock band Them Hills.  Elkan has performed live with Broken Bells, Hella and Kim Deal and has appeared on recordings by Hella, Team Sleep, Norah Jones and Zach Hill.  Elkan produced Aaron Ross' 2007 album "Shapeshifter" and tracks for Golden Shoulders' "Get Reasonable" 2009.  Elkan also co-produced Zach Hill & Holy Smokes' "Masculine Drugs" 2004 and Holy Smokes' "Talk to Your Kids about Gangs" 2006 as well as Alela Diane's 2009 album "To Be Still".

Jon Sortland: Jon Sortland (born September 12, 1973) is an American musician, currently playing the drums for indie rock band The Shins.  Sortland also drums, plays bass and keyboards and provides backing vocals in the band Broken Bells.  Sortland is also the drummer and singer in the band E V Kain.  Sortland is endorsed by Paiste and C&C Drums.

Supporting paragraphs: Broken Bells Cast (band)
Answer: yes