Problem: ZZ Top  is an American rock band formed in 1969 in Houston, Texas. The band has, since 1970, consisted of bassist and lead vocalist Dusty Hill, guitarist and lead vocalist Billy Gibbons (the band's leader, main lyricist and musical arranger), and drummer Frank Beard. "As genuine roots musicians, they have few peers", according to former musician, critic and collector Michael "Cub" Koda. "Gibbons is one of America's finest blues guitarists working in the arena rock idiom [...] while Hill and Beard provide the ultimate rhythm section support."

The original line-up was formed in Houston and consisted of Gibbons, organist Lanier Greig (died February 2013) and drummer Dan Mitchell.  The name of the band was Gibbons' idea. The band had a little apartment covered with concert posters and he noticed that many performers' names utilized initials. Gibbons particularly noticed B.B. King and Z.Z. Hill and thought of combining the two into "ZZ King", but considered it too similar to the original name. He then figured that "king is going at the top" which brought him to "ZZ Top".  ZZ Top was managed by Bill Ham, a Waxahachie, Texas native who had befriended Gibbons a year earlier. They released their first single, "Salt Lick", in 1969, and the B-side contained the song "Miller's Farm". Both songs were credited to Gibbons. Immediately after the recording of "Salt Lick", Greig was replaced by bassist Billy Ethridge, a band-mate of Stevie Ray Vaughan, and Mitchell was replaced by Frank Beard of the American Blues. Due to lack of interest from U.S. record companies, ZZ Top accepted a record deal from London Records. Unwilling to sign a recording contract, Ethridge quit the band and Dusty Hill was selected as his replacement. After Hill moved from Dallas to Houston, ZZ Top signed with London in 1970. They performed their first concert together at the Knights of Columbus Hall in Beaumont on February 10.  In addition to assuming the role as the band's leader, Gibbons became the main lyricist and musical arranger. With the assistance of Ham and engineer Robin Hood Brians, ZZ Top's First Album (1971) was released and exhibited the band's humour, with "barrelhouse" rhythms, distorted guitars, double entendres, and innuendo. The music and songs reflected ZZ Top's blues influences. Following their debut album, the band released Rio Grande Mud (1972), which failed commercially and the promotional tour consisted of mostly empty auditoriums.

what happened in 1969

Answer with quotes: They released their first single, "Salt Lick", in 1969,


Problem: Adam Charles Clayton, the oldest child of Brian and Jo Clayton, was born on 13 March 1960 in Chinnor, Oxfordshire, England. His father was a pilot with the Royal Air Force, who moved into civil aviation, and his mother was a former airline stewardess. When he was 4 years old, Clayton's father worked in Kenya as a pilot with East African Airways, the family being resident in Nairobi (Clayton regards this as the happiest period of his childhood). In 1965, the family moved to Malahide, County Dublin in the Republic of Ireland, where Clayton's brother Sebastian was born.

In September 1976, Mullen put an advert onto the school's bulletin board seeking other musicians to form a band; Clayton showed up for the first meeting and practice, so did the Edge with his older brother Richard Evans ("Dik"), Bono, and Ivan McCormick and Peter Martin who were two of Mullen's friends. McCormick and Martin left the band soon after its inception.  While the band was a five-piece (consisting of Bono, the Edge, Mullen, Dik Evans, and Clayton) it was known as "Feedback". The name was subsequently changed to "The Hype", but changed to "U2" soon after Dik Evans left. Clayton stood in as the nearest thing that the band had to a manager in its early life, handing over the duties to Paul McGuinness in May 1978. In 1981, around the time of U2's second, spiritually charged album, October, a rift was created in the band between Clayton and McGuinness, and the three other band members. Bono, The Edge, and Mullen had joined a Christian group, and were questioning the compatibility of rock music with their spirituality. However, Clayton, with his more ambiguous religious views, was less concerned, and so was more of an outsider.  In 1995, after the Zoo TV Tour and Zooropa album, Clayton headed to New York with bandmate Mullen to receive formal training in the bass; until then Clayton had been entirely self-taught. During that period, he worked on U2's experimental album, released under the pseudonym "Passengers", entitled Original Soundtracks 1. That album features one of the few instances where Clayton has appeared as a vocalist; he spoke the last verse of "Your Blue Room", the album's second single. Prior to this Clayton had only provided live backing vocals to tracks such as "Out of Control", "I Will Follow", "Twilight" and "Bullet the Blue Sky". Since 1997's Popmart tour Clayton has not sung live in any capacity for the band. In 1996, while still in New York, Clayton collaborated with Mullen to re-record the Mission: Impossible theme.

When did he become U2?

Answer with quotes:
The name was subsequently changed to "The Hype", but changed to "U2" soon after Dik Evans left.