Question: Which singer formed a band first, Chris Martin or Jimmy Gestapo?

Context articles: Homecoming (Kanye West song)
Coldplay
Chris Martin
Murphy's Law (band)
Friendship Loyalty Commitment
Avitone Records
A7 (bar)
Jimmy Gestapo
Something's Gotta Give (album)
All Good Things (Come to an End)

"Homecoming" is a song by American hip-hop recording artist and record producer Kanye West.
 It was included as the twelfth song on the track-listing of his third studio album "Graduation" (2007).
 The track was produced by West with Warryn Campbell and features a guest appearance from Chris Martin, lead vocalist of the English alternative rock band Coldplay, who sings the song's chorus.
 West met Chris Martin by chance at the famed Abbey Road Studios in London, England on February 14, 2006.
 Afterwards, the two artists held an impromptu jam session and recorded the track.
 "Homecoming" is actually a reworking of a track known as "Home (Windy)" that originated from a demo tape dating back to the year 2001.
 The early recordings of "Home (Windy)" exhibit West's once trademark soulful vocal sample production style.
 Additionally, the lyrics of the song's chorus are different than that of Martin's and were originally sung by singer John Legend, who was known at the time as John Stephens.
 West wrote "Homecoming" as a tribute dedicated to his hometown of Chicago, Illinois.
 His conceptual lyrics feature an extended metaphor where he uses a love interest to speak on his relationship with the city.
Coldplay are a British rock band formed in 1996 by lead vocalist and keyboardist Chris Martin and lead guitarist Jonny Buckland at University College London (UCL).
 After they formed under the name Pectoralz, Guy Berryman joined the group as bassist and they changed their name to Starfish.
 Will Champion joined as drummer and backing vocalist, completing the lineup.
 Creative director Phil Harvey is often referred to as the fifth member by the band.
 The band renamed themselves "Coldplay" in 1998, before recording and releasing three EPs: "Safety" in 1998 and "Brothers & Sisters" and "The Blue Room" in 1999.
 "The Blue Room" was their first release on a major label, after signing to Parlophone.
Christopher Anthony John Martin (born 2 March 1977) is an English singer, songwriter, musician, record producer and philanthropist.
 He is best known as the lead singer and co-founder of the British rock band Coldplay.
 Born in Whitestone, near Exeter in Devon, Martin went to University College London where he formed a rock band with Jonny Buckland in 1996 called Pectoralz, which was eventually renamed Coldplay in 1998.
Murphy's Law is an American hardcore punk band from New York City, New York, United States, formed in 1982.
 While vocalist Jimmy Gestapo remains the only founding member of the band, in the past the line-up has consisted of former members of bands such as Skinnerbox, Danzig, The Bouncing Souls, Mucky Pup, Dog Eat Dog, Hanoi Rocks, Agnostic Front, and D Generation.
Friendship, loyalty, commitment is the debut studio album by the American hardcore punk band 25 ta Life, which was released on July 6, 1999.
 This album features a Warzone cover song "As one", and special appearances by Jamey Jasta of Hatebreed, Roger Miret and Vinnie Stigma of Agnostic Front, Jimmy Gestapo from Murphy's Law, Paul Bearer from Sheer Terror and more.
 The song "Over the years" was featured at the Tony Hawk's Underground 2 soundtrack.
Avitone Recordings is an independent record label formed by singer/songwriter Jody Watley in 1995, established after Watley departed ways with MCA Records.
 The singer formed the label as a vehicle to support her own musical evolution outside the major label system .
 Watley's fifth studio album, 1995s "Affection", was the labels first release.
A7 was a club in New York City.
 From 1981 to 1984, it was the unofficial headquarters of the New York hardcore scene.
 The tiny space was located on the southeast corner of East 7th Street and Avenue A in Manhattan's East Village.
 The Violators were one of the first punk bands to play there, performing once a month for over a year.
 Other bands that played on the Violators' night included Minor Threat, Social Distortion, SS Decontrol, the Undead and False Prophets.
 Many of the NYC Oi!
 and hardcore bands would play on the bill, including hardcore icons Bad Brains, and gradually the A7 club turned into a hardcore scene.
 The club was staffed by members of the NYHC scene, including Doug Holland of Kraut, Raybeez of Agnostic Front and Warzone, and Jimmy Gestapo of Murphy's Law.
 The club operated without a liquor license and was often raided by police.
 A warning spray-painted on the outside of the building read: "Out of town bands remember where you are".
James Drescher (born December 10, 1960), better known as Jimmy G or Jimmy Gestapo and also known as Jimmy Spliff, is the lead singer for New York based hardcore punk band Murphy's Law.
Something's Gotta Give is the fifth full-length studio album by New York hardcore band, Agnostic Front.
 It was released in June 1998 on Epitaph Records and follows 1995's "Raw Unleashed" compilation album.
 It is actually the first studio album since 1992's "One Voice".
 The album was co-produced by Billy Milano, the frontman of crossover thrash bands S.O.D. and M.O.D..
 It marks a return to a more hardcore punk style of sound than the thrash metal inspired music of "One Voice".
 Backing vocals, amongst others, were provided by Tim Armstrong and Lars Frederiksen of Rancid, and Jimmy Gestapo of Murphy's Law.
"All Good Things (Come to an End)" is a song by Canadian-Portuguese singer Nelly Furtado from her third studio album "Loose" (2006).
 It was written by Furtado, Tim "Timbaland" Mosley, Chris Martin, and Nate "Danja" Hills.
 The song was released as the album's third European single in November 2006.
 It was released as the fourth single in the United States and Australia.
 The single featured Chris Martin, frontman of the band Coldplay, harmonizing throughout the song.
 The original version had him say a few words at the beginning, and sing the chorus behind Furtado.
 Critically, "All Good Things (Come to an End)" was praised for having diversity in comparison to other songs on "Loose", but at the same time criticized for its mellowness.
 Commercially, the song did well on the music charts, reaching number-one in more than fifteen countries including Austria, Czech Republic, Denmark, Germany and the Netherlands.