Question: Which music group formed first, Deerhoof or Yellowcard?

Context articles: Sateliti
Yellowcard
Vibe Squad
PureH
The Island Def Jam Music Group
SV St. Georg
Shamur
Deerhoof
Sean Mackin (musician)
Japp–Maitland condensation

Sateliti is a Bosnian Root music group formed in 1989.
 Today they are the most popular root music group in Bosnia.
 The original singer Muto, is still with the group that he formed, he is the main vocalist.
Yellowcard was an American pop punk band that formed in Jacksonville, Florida, in 1997 and were based in Los Angeles beginning in 2000.
 The band is well known for its singles "Ocean Avenue", "Only One", and "Lights and Sounds".
 The group's music is distinctive within its genre because it features the prominent use of a violin.
 The band released ten studio albums, with its most recent and final one, "Yellowcard", released on September 30, 2016.
 The band played its final show on March 25, 2017, at the House of Blues in Anaheim, California.
Vibe Squad is an African pop group formed in 2009.
 The group was initially set up as a quintet consisting of Kelvin Amoako,William Osei- Obengo, Richard Korede and Bright Oduro who were all students at NewVic Sixth Form College in the London Borough of Newham.
 Bright Oduro (alias: Rudboi) was the first to leave the group in pursuance of a career in music production.
 The music group Vibe Squad (V.S) emerged from the fusion of Four boys coming from West African Diaspora backgrounds with overwhelming talents after an intense talent spotting exercise.
 Vibe Squad was formed in London and the headquarters is still situated at the same location.
 Being an upcoming group, there were barricades that the V.S had to break in order to get noticed, which they did with the help of their first hit single ‘Whine Pon Me’.
PureH is a Slovenian electronic music group formed in 1993, when their first clips “Inertia” appeared.
 Before that they were gathering experiences as musicians in several bands (Extreme Smoke, D.T.W., Patareni, etc.) The group initially consisted of a producer and video artist.
 After performing at the festival Break21, the group was joined by a drummer, guitarist and bass player.
 PureH have appeared on various compilation cds, festivals, TV/radio commercials, World exhibition Expo 2000 and have received Bumerang 2000 alternative music award for experimental music.
 The remix album Signia was released in 2007 with artists KK Null, Eraldo Bernocchi, Surgeon, Psychedelic Desert, Chris Wood, P.C.M. and others.
 They release their albums for one of the leading alternative record companies in Slovenia.
The Island Def Jam Music Group (IDJMG) was an American record label group formed in 1998, combining the operations of over 14 record labels including Island Records, Def Jam Recordings, and Mercury Records.
 In 2011, Motown Records was split from The Universal/Motown Records Group and subsequently became a division of The Island Def Jam Music Group.
 On April 1, 2014, Universal Music announced that Island Def Jam's operations would be split between three entities: Island Records, Motown Records, and Def Jam Recordings.
SV St. Georg Hamburg is a German association football club playing in Hamburg.
 The club was established 3 June 1895 and shares a common origin with "FC Hammonia Hamburg": both sides arose out of the students group Seminarvereinigung Frisch-Auf with "St. Georg" being formed first on the left bank of the Alster River, and "Hammonia" appearing later on the right bank.
 Like their brother side, "St. Georg" was a founding member of the German Football Association (Deutscher Fussball Bund or German Football Association) at Leipzig in 1900.
 However, while "Hammonia" folded after only a short existence, "St. Georg" still plays today.
Shamur is a music group formed by Italian producers, Emanuele Marascia and Alessandro Murru, the same producers of Kortezman and Marascia.
 Shamur are signed to an exclusive multi-album worldwide deal with DSE Records, and Universal Music Group in the UK.
Deerhoof is an American independent music group formed in San Francisco in 1994.
 It currently consists of founding drummer Greg Saunier, bassist and singer Satomi Matsuzaki, and guitarists John Dieterich and Ed Rodriguez.
 Initially performing improvised noise punk, Deerhoof became widely renowned and influential in the 2000s through prodigious and self-produced creative output combining "noise, sugary <nowiki>[</nowiki>pop<nowiki>]</nowiki> melodies, and an experimental spirit into utterly distinctive music".
 They have released 14 studio albums since 1997; their latest album "Mountain Moves" was released in September 2017.
 Their live shows are characterized by minimal gear, maximal volume, and surrealist banter.
Sean Mackin (born April 30, 1979) is an American rock musician.
 He is best known as the violinist and backing vocalist for the American pop punk music group Yellowcard.
The Japp–Maitland condensation is an organic reaction and a type of Aldol reaction and a tandem reaction.
 In a reaction between the ketone 2-pentanone and the aldehyde benzaldehyde catalyzed by base the bis Aldol adduct is formed first.
 The second step is a ring-closing reaction when one hydroxyl group displaces the other in a nucleophilic substitution forming an oxo-tetrahydropyran.