Question: Are both Broken Bells and Cast considered rock bands?
Related documents: [0]  [DOC] 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. [END] 
[1]  [DOC] 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. [END] 
Answer: 
yes
yes