Question: Between The White Stripes and U2, which band was formed earlier?
Context: Megan Martha "Meg" White (born December 10, 1974) is an American drummer and occasional singer known for her work with Jack White in the Detroit rock duo The White Stripes.  On an impulse, she played on Jack's drums in 1997.  The two decided to form a band and began performing two months later, calling themselves The White Stripes because of their last name and Meg's affinity for peppermint candy.  The band quickly became a Detroit underground favorite, before reaching national, then international fame.  White has been nominated for various awards as a part of the White Stripes, and has received four Grammy Awards. The New York Jets' colors are hunter green and white.  The team's current uniform and primary logo, in use since 1998, are modernized versions of the design used from 1965-77.  The helmet is white with two parallel green stripes down the center, and a green facemask.  The primary logo, which appears on each side of the helmet and on the jersey front by the player's left shoulder, is a green oval with the word "JETS" in thick white sans-serif italics over "NY" in outline serif lettering, and a white miniature football graphic at bottom center.  The jerseys have standard one-color block numerals and serif lettering, alternating stripes on the shoulders, and opposite-colored sleeves and TV numerals.  The team uses both white pants with two parallel green stripes from hip to knee on each side, and green pants with white stripes. Flat Duo Jets is an American psychobilly band from Chapel Hill, North Carolina, and Athens, Georgia.  They were a major influence on several bands of the 1990s and 2000s, including The White Stripes.  In interviews, Jack White (the White Stripes' lead singer and guitarist) has often acknowledged Dexter Romweber's influence. The White Stripes were an American rock duo formed in 1997 in Detroit, Michigan.  The group consisted of Jack White (songwriter, vocals, guitar, piano, and mandolin) and Meg White (drums and vocals).  After releasing several singles and three albums within the Detroit music scene, The White Stripes rose to prominence in 2002, as part of the garage rock revival scene.  Their successful and critically acclaimed albums "White Blood Cells" and "Elephant" drew attention from a large variety of media outlets in the United States and the United Kingdom, with the single "Seven Nation Army" and its guitar line becoming their signature song.  The band recorded two more albums, "Get Behind Me Satan" in 2005 and "Icky Thump" in 2007, and dissolved in 2011 after a lengthy hiatus from performing and recording. Get Behind Me Satan is the fifth studio album by American alternative rock band The White Stripes, released on June 7, 2005, on V2 Records.  Though still basic in production style, the album marked a distinct change from its guitar-heavy 2003 predecessor, "Elephant".  With its reliance on piano-driven melodies and experimentation with marimba on "The Nurse" and "Forever For Her (Is Over For Me)", "Get Behind Me Satan" plays down the punk, garage rock and blues influences that dominated earlier White Stripes albums.  Frontman Jack White plays with different technique than in the past, replacing electric guitar with piano, mandolin, and acoustic guitar on all but a handful of tracks, as his usual riff-conscious lead guitar style is overtaken by a predominantly rhythmic approach. " Rolling Stone" ranked it the third best album of the year and it received the Grammy for Best Alternative Music Album in 2006.  As of February 2007, "Get Behind Me Satan" had sold 850,000 units in the United States. U2 are an Irish rock band from Dublin formed in 1976.  The group consists of Bono (lead vocals and rhythm guitar), the Edge (lead guitar, keyboards, and backing vocals), Adam Clayton (bass guitar), and Larry Mullen Jr. (drums and percussion).  Initially rooted in post-punk, U2's musical style evolved throughout their career, yet has maintained an anthemic sound built on Bono's expressive vocals and the Edge's effects-based guitar textures.  Their lyrics, often embellished with spiritual imagery, focus on personal and sociopolitical themes.  Popular for their live performances, the group have staged several ambitious and elaborate tours over their career. White's illusion is a brightness illusion where certain stripes of a black and white grating is partially replaced by a gray rectangle (Fig. 1).  Both of the gray bars of A and B are the same color and opacity.  The brightness of the gray pieces appear to shift toward the brightness of the top and bottom bordering stripes.  This is in apparent opposition to lateral inhibition as it cannot explain this occurrence.  This occurs even when the gray patches in the black stripes are bordered by more white than black (and conversely for the gray patches in the white stripes).  A similar illusion occurs when the horizontal strips have different colors; this is known as Munker-White's illusion or Munker's illusion. The flag of Adjara is a flag of Georgia's autonomous republic of Adjara.  It displays seven dark blue and white stripes, with the national flag of Georgia shown in canton.  The dark blue stripes symbolize the Black Sea and the white stripes symbolize purity.  The flag was adopted on 20 July 2004 by the Supreme Council of Adjara. De Stijl is the second studio album by the American garage rock band The White Stripes, released on June 20, 2000 on Sympathy for the Record Industry.  The album reached number thirty-eight on "Billboard"'s Independent Albums chart in 2002, when The White Stripes' popularity began to grow.  It has since become a cult favorite among White Stripes fans, due to the simplicity of the band's blues/punk fusion. White Blood Cells is the third studio album by American garage rock duo The White Stripes, released on July 3, 2001.  Recorded in less than one week at Easley-McCain Recording in Memphis, Tennessee, and produced by frontman and guitarist Jack White, it was the band's final record released independently on Sympathy for the Record Industry.  Bolstered by the hit single "Fell in Love with a Girl", the record propelled The White Stripes into early commercial popularity and critical success.  In 2012, "Rolling Stone" ranked the album at number 497 on its list of The 500 Greatest Albums of All Time.
Answer: U2