Question: Which band was formed first,  Let's Active or The Jesus and Mary Chain?

full_context: Document 1: Let's Active: Let's Active is an American rock group formed in Winston-Salem, North Carolina in 1981, and often identified with the jangle pop guitar work of the group's frontman and songwriter Mitch Easter. After disbanding in 1990, the group reformed in August 2014 to play a benefit show in North Carolina.
Document 2: Murray Dalglish: Murray Dalglish was the original drummer for The Jesus and Mary Chain from their formation in early 1984 until November 1984 when he was replaced by Bobby Gillespie. Aged 16 when he joined the band, Dalglish played a two-piece drum kit, which he did whilst standing up; this style would later be carried on in Gillespie's playing. His drumming can be heard on the band's first single "Upside Down", along with its B-side, the Syd Barrett cover "Vegetable Man". He was reportedly kicked out of the band as his father demanded that Dalglish be given more money, despite the fact that the band at the time was making little, if any, money at all.
Document 3: Automatic (The Jesus and Mary Chain album): Automatic is the third album by Scottish alternative rock band The Jesus and Mary Chain. The group on this record is basically the core duo of brothers William and Jim Reid with a drum machine providing percussion and even a synthesizer filling in on bass guitar. The only other credited musician was Richard Thomas who joined the touring version of The Jesus and Mary Chain as a drummer. Thomas drummed on "Gimme Hell" and was a former member of Dif Juz. He also made appearances on Cocteau Twins' 1986 Victorialand LP and This Mortal Coil's 1986 Filigree & Shadow.
Document 4: The Jesus and Mary Chain: The Jesus and Mary Chain are a Scottish alternative rock band formed in East Kilbride in 1983. The band revolves around the songwriting partnership of brothers Jim and William Reid. After signing to independent label Creation Records, they released their first single "Upside Down" in 1984. Their debut album "Psychocandy" was released to critical acclaim in 1985 on major label WEA. The band went on to release five more studio albums before disbanding in 1999. They reunited in 2007.
Document 5: Upside Down (The Jesus and Mary Chain song): "Upside Down" is the first single from the Scottish alternative rock band The Jesus and Mary Chain. The song was written by William Reid and Jim Reid, and was produced by The Jesus and Mary Chain. The b-side is a cover of a Syd Barrett song and was produced by Joe Foster.
Document 6: The Rentals: The Rentals are an American rock band fronted by vocalist Matt Sharp, best known as the former bassist for Weezer. Sharp has been the only consistent member since the group's inception. The band is best known for their 1995 single "Friends of P." The Rentals released two albums, "Return of the Rentals" (1995) and "Seven More Minutes" (1999) on Maverick Records before quietly splitting in 1999 following a world tour. The group reformed in 2005 and have since released several EPs and a third full-length album, "Lost in Alphaville", which was released August 26, 2014, on Polyvinyl Records. Due to the revolving nature of studio and live collaborators, determining who is actually an official member of the group at any one point is difficult.
Document 7: Damage and Joy: Damage and Joy is the seventh studio album by Scottish alternative rock band The Jesus and Mary Chain. It was released on 24 March 2017 by Artificial Plastic Records. It is the group's first album in 19 years, and marks their first collaboration with producer Youth.
Document 8: R.E.M.: R.E.M. was an American rock band that formed in Athens, Georgia, in 1980 by lead singer Michael Stipe, guitarist Peter Buck, bassist/backing vocalist Mike Mills, and drummer Bill Berry. One of the first alternative rock bands, R.E.M. was noted for Stipe's particular vocal quality and obscure lyrics, Buck's ringing, arpeggiated guitar style, and Mills' melodic basslines and backing vocals. R.E.M. released its first single—"Radio Free Europe"—in 1981 on the independent record label Hib-Tone. The single was followed by the "Chronic Town" EP in 1982, the band's first release on I.R.S. Records. In 1983, the group released its critically acclaimed debut album, "Murmur", and built its reputation over the next few years through subsequent releases, constant touring, and the support of college radio. Following years of underground success, R.E.M. achieved a mainstream hit in 1987 with the single "The One I Love". The group signed to Warner Bros. Records in 1988, and began to espouse political and environmental concerns while playing large arenas worldwide.
Document 9: Upside Down: The Best of The Jesus and Mary Chain: Upside Down: The Best of The Jesus and Mary Chain is a greatest hits album by Scottish alternative rock band, The Jesus and Mary Chain. It was released on 27 September 2010 via Music Club Deluxe.
Document 10: Jim Reid: Jim Reid (born 29 December 1961) is the lead singer for the alternative rock band The Jesus and Mary Chain, which he formed with his elder brother and guitarist William Reid. Reid was made famous after being referred to by name, in Canadian indie band sensation Alvvays' song, "Lollipop (Ode to Jim)".
Document 11: The dB's: The dB's are an American power pop and jangle pop group who first came into prominence in the late 1970s and 1980s. The band members are Peter Holsapple, Chris Stamey, Will Rigby and Gene Holder. While the members are all from Winston-Salem, North Carolina, the group was formed in New York City in 1978. In 2012, the band completed its first new studio album in 25 years and its first in 30 years with the original 1978 lineup.
Document 12: The Replacements (band): The Replacements were an American rock band formed in Minneapolis, Minnesota, in 1979. Initially a punk rock band, they are considered pioneers of alternative rock. The band was composed of the guitarist and vocalist Paul Westerberg, guitarist Bob Stinson, bass guitarist Tommy Stinson and drummer Chris Mars for most of its career. Following several acclaimed albums, including "Let It Be" and "Tim", Bob Stinson left the band in 1986, and Slim Dunlap joined as lead guitarist. Steve Foley replaced Mars in 1990. Towards the end of the band's career, Westerberg exerted more control over the creative output. The group disbanded in 1991, with the members eventually pursuing various projects. A reunion was announced on October 3, 2012. The Replacements never had significant commercial success, except for "I'll Be You", which hit number 1 on the "Billboard" Alt Rock chart, but they influenced numerous alternative rock acts.
Document 13: Talk Talk: Talk Talk were an English rock band, active from 1981 until their breakup in 1992. Their early hit singles include "Today", "Talk Talk" (both 1982), "It's My Life" and "Such a Shame" (both 1984). Although the band only experienced moderate success in their native country, they established some international success. Talk Talk moved away from synth-pop towards more experimental music in the mid-1980s, helping to pioneer what became known as post-rock. They achieved moderate success in Europe and the UK with the subsequent singles "Life's What You Make It" (1985) and "Living in Another World" (1986), and in 1988 they released their fourth album "Spirit of Eden", which was commercially less successful.
Document 14: The Bangles: The Bangles are an American pop rock band formed in Los Angeles in 1981. They scored several hit singles as that decade continued. The band's hits include "Walk Like an Egyptian", "Billboard" magazine's number-one single of 1987, as well as two number-two hits, "Manic Monday" and "Hazy Shade of Winter", and their 1989 number-one single "Eternal Flame".
Document 15: Never Understand: "Never Understand" is the first single from the Scottish alternative rock band The Jesus and Mary Chain's debut album "Psychocandy". It was the band's first release on Blanco y Negro Records and was released through them in February 1985. The song was written by William Reid and Jim Reid, and was produced by The Jesus and Mary Chain. It is considered influential for its use of guitar feedback.
ground_truth: Let's Active