Question: What kind of group does U2 discography and Sunday Bloody Sunday have in common?

full_context: Document 1: U2 Live at Red Rocks: Under a Blood Red Sky: U2 Live at Red Rocks: Under a Blood Red Sky is a concert film by Irish rock band U2. It was recorded on 5 June 1983 at Red Rocks Amphitheatre in Colorado, United States, on the group's War Tour. Originally released in 1984 on videocassette, "U2 Live at Red Rocks" was the band's first video release. It accompanied a 1983 live album entitled "Under a Blood Red Sky", on which two tracks from the film appear. The video was directed by Gavin Taylor and produced by Rick Wurpel and Doug Stewart.
Document 2: War (U2 album): War is the third studio album by Irish rock band U2. It was produced by Steve Lillywhite, and was released on 28 February 1983 on Island Records. The album has come to be regarded as U2's first overtly political album, in part because of songs like "Sunday Bloody Sunday" and "New Year's Day", as well as the title, which stems from the band's perception of the world at the time; Bono stated that "war seemed to be the motif for 1982."
Document 3: U218 Singles: U218 Singles is a greatest hits album by the Irish rock band U2, released in November 2006. In most markets, the album contains 18 songs. The first 16 tracks are 16 of their most successful and popular singles. The seventeenth track is a cover version, in collaboration with Green Day, of The Skids' "The Saints Are Coming" to benefit Hurricane Katrina charities. The eighteenth and closing track is a new song called, "Window in the Skies". However, in some markets, such as the United Kingdom, an extra song, "I Will Follow" is added to the track list as the opening track. "U218 Videos", a DVD featuring music videos from throughout U2's career, was released concurrently.
Document 4: U2 discography: The discography of Irish rock band U2 consists of thirteen studio albums, one live album, three compilation albums, sixty-seven singles, and eight extended plays (EPs). The band formed at Mount Temple Comprehensive School in 1976 as teenagers. In 1979, the group issued their first release, the EP "U2-3", which sold well in Ireland. The following year, the group signed to Island Records and released their debut album, "Boy". It reached number 52 in the UK and number 63 in the US. They followed it up with the release of "October" (1981) and "War" (1983). "War" was a commercial success, becoming the band's first number-one album in the UK while reaching number 12 in the US. The album yielded the singles "Sunday Bloody Sunday" and "New Year's Day" and have since become among the band's most popular songs. On the subsequent War Tour, the group recorded the live album "Under a Blood Red Sky" and concert film "", both of which sold well and helped establish them globally as a live act.
Document 5: One (U2 song): "One" is a song by Irish rock band U2. It is the third track from their 1991 album "Achtung Baby", and it was released as the record's third single in February 1992. During the album's recording sessions at Hansa Studios in Berlin, conflict arose between the band members over the direction of U2's sound and the quality of their material. Tensions almost prompted the band to break up until they achieved a breakthrough with the improvisation of "One"; the song was written after the band members were inspired by a chord progression that guitarist the Edge was playing in the studio. The lyrics, written by lead singer Bono, were inspired by the band members' fractured relationships and the German reunification. Although the lyrics ostensibly describe "disunity", they have been interpreted in other ways.
Document 6: Sunday Bloody Sunday: "Sunday Bloody Sunday" is a song by Irish rock band U2. It is the opening track from their 1983 album "War" and was released as the album's third single on 11 March 1983 in Germany and the Netherlands. "Sunday Bloody Sunday" is noted for its militaristic drumbeat, harsh guitar, and melodic harmonies. One of U2's most overtly political songs, its lyrics describe the horror felt by an observer of the Troubles in Northern Ireland, mainly focusing on the Bloody Sunday incident in Derry where British troops shot and killed unarmed civil rights protesters and bystanders. At the same time, the lyrics reject hate and revenge as a response, as noted in the line "There's many lost, but tell me who has won." Along with "New Year's Day," the song helped U2 reach a wider listening audience. It was generally well received by critics on the album's release.
Document 7: War Tour: The War Tour was a concert tour by the Irish rock band U2, which took place in 1982 and 1983 in support of the group's third album "War". The tour took place in Western Europe, the United States, and Japan, with new material from "War" taking an increasing role as the tour progressed. Venues were mostly halls, but some arenas were introduced later on. U2's performances were very well received both critically and commercially, especially in the United States where U2 broke through to become a major act. Scenes of lead singer Bono waving a white flag during the song "Sunday Bloody Sunday" became an emblematic image of this phase of U2's career. It was their first tour as full-time headlining act and their first to be profitable.
Document 8: Led Zeppelin discography: The discography of the English rock band Led Zeppelin consists of nine studio albums, four live albums, nine compilation albums, 16 singles and eight music downloads. Formed in London in 1968, the group consisted of guitarist Jimmy Page, singer Robert Plant, bass player John Paul Jones, and drummer John Bonham. The band pioneered the concept of album-oriented rock and often refused to release popular songs as singles. Nevertheless, four of their ten songs that reached the Hot 100 had no mention of the title in the lyrics: "Immigrant Song", "Black Dog", "Over the Hills and Far Away", "D'yer Mak'er". Their debut album, "Led Zeppelin" (1969), released by Atlantic Records, charted at number six on the UK Albums Chart and at number ten on the United States "Billboard" 200. It received several sales certifications, including an 8 times multi-platinum from the Recording Industry Association of America (RIAA) and Diamond from the Music Canada. Led Zeppelin's second studio album, "Led Zeppelin II", recorded when the band were on tour, was released a few months after the first. It reached number one in several countries, including the UK and the US, where it was certified 12 times multi-platinum. The album produced Led Zeppelin's most successful single, "Whole Lotta Love", which peaked at several music charts in the top 10. "Led Zeppelin III" (1970) was a softer, more folk-based effort compared to the hard rock of the band's previous releases. It also peaked at number one in the UK and in the US.
Document 9: Zoo Station (song): "Zoo Station" is a song by Irish rock band U2. It is the opening track from their 1991 album "Achtung Baby", a record on which the group reinvented themselves musically by incorporating influences from alternative rock, industrial, and electronic dance music. As the album's opening track, "Zoo Station" introduces the band's new sound, delivering industrial-influenced percussion and several layers of distorted guitars and vocals. Similarly, the lyrics suggest the group's new intents and anticipations. The introduction, featuring an "explosion" of percussion and a descending glissando for a guitar hook, was meant to make the listener think the album was mistakenly not U2's latest record or that their music player was broken.
Document 10: U2: 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.
Document 11: Sunday Bloody Sunday (disambiguation): "Sunday Bloody Sunday" is a song by U2.
Document 12: Bloody Sunday (1921): Bloody Sunday or Belfast's Bloody Sunday was a day of violence in Belfast, Ireland (present-day Northern Ireland) on 10 July 1921, during the Irish War of Independence. In retaliation for an Irish Republican Army (IRA) ambush of a police raiding party, Protestant loyalists attacked Catholic enclaves, burning homes and businesses. This sparked gun battles between republican and loyalist paramilitaries, and street fighting between Catholics and Protestants. There was also shooting between republicans and police, and it is claimed that some police patrols fired indiscriminately at Catholic civilians. Seventeen people were killed on 10 July, and a further eleven were killed or fatally wounded over the following week. At least 100 people were injured. About 200 houses were badly damaged or destroyed, leaving 1,000 people homeless. The violence took place just before a truce came into effect, which ended the war in most of Ireland.
Document 13: Achtung Baby: Achtung Baby ( ) is the seventh studio album by Irish rock band U2. It was produced by Daniel Lanois and Brian Eno, and was released on 18 November 1991 on Island Records. Stung by criticism of their 1988 release, "Rattle and Hum", U2 shifted their musical direction to incorporate influences from alternative rock, industrial music, and electronic dance music into their sound. Thematically, "Achtung Baby" is darker, more introspective, and at times more flippant than their previous work. The album and the subsequent multimedia-intensive Zoo TV Tour were central to the group's 1990s reinvention, by which they abandoned their earnest public image for a more lighthearted and self-deprecating one.
Document 14: Bloody Sunday (1972): Bloody Sunday – sometimes called the Bogside Massacre – was an incident on 30 January 1972 in the Bogside area of Derry, Northern Ireland, when British soldiers shot 28 unarmed civilians during a peaceful protest march against internment. Fourteen people died: thirteen were killed outright, while the death of another man four months later was attributed to his injuries. Many of the victims were shot while fleeing from the soldiers and some were shot while trying to help the wounded. Other protesters were injured by rubber bullets or batons, and two were run down by army vehicles. The march had been organised by the Northern Ireland Civil Rights Association (NICRA). The soldiers involved were members of the 1st Battalion, Parachute Regiment, also known as "1 Para".
Document 15: Songs of Innocence (U2 album): Songs of Innocence is the thirteenth studio album by Irish rock band U2. Released on 9 September 2014, it was produced by Danger Mouse, with additional production from Paul Epworth, Ryan Tedder, Declan Gaffney, and Flood. The album was announced at an Apple Inc. product launch event and released the same day to all iTunes Store customers at no cost. It was exclusive to iTunes, iTunes Radio, and Beats Music until 13 October 2014, when it received a physical release on Island and Interscope Records. The digital release made the record available to over 500 million iTunes customers, for what Apple CEO Tim Cook marketed as "the largest album release of all time".
ground_truth: band