Question: When was the indie rock band which has a member of Broken Bells as the lead vocalist and guitarist formed? 

Context articles: Meyrin Fields
James Mercer (musician)
The Shins
Jon Sortland
Holding On for Life
Dan Elkan
Broken Bells (album)
Broken Bells
Brian Bell
Juanita Stein

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.
James Russell Mercer (born December 26, 1970) is an American singer-songwriter, guitarist, and musician.
 He is the founder, vocalist, lead singer-songwriter, and sole remaining original member of the indie rock group The Shins.
 In 2009, Mercer and producer Danger Mouse formed the side project Broken Bells, for which they released a self-titled album in March 2010, followed by "After the Disco" in 2014.
 Mercer has also acted, appearing in Matt McCormick's feature film "Some Days Are Better Than Others", which premiered in 2010.
The Shins are an American indie rock band from Albuquerque, New Mexico, formed in 1996.
 The band's current lineup consists of James Mercer (vocals, guitar, songwriter), Jon Sortland (drums), Mark Watrous (guitar), Casey Foubert (guitar), Yuuki Matthews (bass), and Patti King (keyboards).
 The band is based in Portland, Oregon.
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.
"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.
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".
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.
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.
Brian Lane Bell (born December 9, 1968) is an American guitarist, singer and songwriter.
 He is best known as the rhythm guitarist, backing vocalist and occasional lead vocalist of the alternative rock band Weezer, with whom he has recorded ten studio albums.
 Bell also fronts the rock band The Relationship, and was previously the lead vocalist and guitarist of the indie rock band Space Twins.
Juanita Stein (born 25 June 1977) is lead vocalist and rhythm guitarist in indie rock band Howling Bells.
 She has younger twin brothers Joel and Ari.
 Joel Stein is lead guitarist in Howling Bells.