Problem: Celtic Frost () were a Swiss heavy metal band from Zurich. They are known for their strong influence on the development of extreme metal. Formed in 1982 as Hellhammer, the band became Celtic Frost in 1984 and was active until 1993. It re-formed in 2001 and disbanded following frontman Tom Gabriel Fischer's departure in 2008.

Celtic Frost's frontman, guitarist and singer Tom Gabriel Fischer, adopted the alias Tom Warrior. With Steve Warrior on bass, he formed one of the earliest extreme metal bands, Hellhammer, in 1981. Steve Warrior was later replaced by Martin Eric Ain - also a pseudonym. The band attracted a small international fan-base, got signed to Noise Records in Germany and recorded their debut EP Apocalyptic Raids in March 1984, now a rare find on eBay or second-hand record stores around the world.  Metal publications were also skeptical of Hellhammer's musical endeavor. Metal Forces loathed the group; that started a long-lasting feud between that zine and Warrior, which kept Celtic Frost from playing in England for a couple of years. Rock Power was not fond of Hellhammer either - they considered it "the most terrible, abhorrent, and atrocious thing 'musicians' were ever allowed to record". In fact, they were "receiving miserable reviews everywhere", Warrior concluded.  Regarding the controversial status of his former band, Thomas said:  Way back in 1984 and 85, when Martin Eric Ain and I recorded Celtic Frost's first two albums Morbid Tales and To Mega Therion, Hellhammer lasted on us almost like a curse. Even though Hellhammer was the very reason we had thought over our goals and conceived the Frost, HH's left-overs kept being mighty rocks in our way. Many voices saw Frost as the same band with just a name-change. The lack of musical quality in HH made it almost impossible for us to get an unbiased reaction for Frost. To make a long story short, it almost killed all our work and dreams.  By May 1984, Hellhammer had disbanded. Fischer and Ain, along with session drummer Stephen Priestly, regrouped as Celtic Frost. Their 1984 debut mini-LP, Morbid Tales was a hit in the underground metal scene, and the band set out on its first tour, through Germany and Austria. This was followed with an EP Emperor's Return. Both early releases are now available on the one CD.

Who else was in the band?

Answer with quotes: Martin Eric Ain


Problem: Bloc Party are an English rock band, currently composed of Kele Okereke (lead vocals, rhythm guitar, keyboards, sampler), Russell Lissack (lead guitar, keyboards), Justin Harris (bass guitar, keyboards, saxophones, backing vocals) and Louise Bartle (drums, percussion). Former members Matt Tong and Gordon Moakes left the band in 2013 and 2015 respectively. Their brand of music, whilst rooted in rock, retains elements of other genres such as electronica and house music. The band was formed at the 1999 Reading Festival by Okereke and Lissack.

Bloc Party's second album, A Weekend in the City, was produced by Garret "Jacknife" Lee. It was released in February 2007, although it was leaked in November 2006. It became available for download on the UK iTunes Store before the physical release, and reached the number 2 spot on the UK Albums Chart. The album also reached number 2 on the Australian and Belgian charts, and debuted at number 12 in the Billboard 200, with 48,000 copies sold. The first single, "The Prayer", was released on 29 January, and became the band's highest charting single in the British Top 40, reaching number 4. In the buildup to the release of the album, BBC Radio 1 DJ Zane Lowe aired a live set by the band from Maida Vale studios on 30 January 2007, featuring a mix of old and new songs. On 1 February 2007, A Weekend in the City was made available to listen to for free through Bloc Party's official MySpace page.  The next single, "I Still Remember", was Bloc Party's highest charting American single, peaking at number 24 on the Modern Rock Chart. The band released their third single, "Hunting for Witches", with an accompanying video clip in August 2007. The single became their only ARIA Chart entry, peaking at number 20. In October 2007, it was announced that Bloc Party would release a new single, "Flux", on 13 November--ahead of their end of year gigs. The electronic song, also produced by Jacknife Lee, was very different from previous singles released by the band.  The band's first gig following the release of A Weekend in the City was on 5 February 2007, in Reading, and was broadcast live on BBC 6 Music. On 20 May 2007, Bloc Party headlined on the In New Music We Trust stage at the BBC Radio 1 Big Weekend in Preston. They also performed at the UK leg of Live Earth on 7 July 2007 at Wembley Stadium. Furthermore, the band played sets at T in the Park and Oxegen 07 that same weekend, as well as Glastonbury and the Reading and Leeds Festivals later in 2007. Bloc Party announced a tour of Australia and New Zealand in August 2007, which would include a special appearance at the Splendour in the Grass Festival on 5 August. On 17 September 2007, they recorded a set for the PBS show Austin City Limits a day after playing at the Austin City Limits Music Festival. On 27 October, the band performed a set at London's The Roundhouse with the Exmoor Singers, a London-based choir, as part of the BBC Electric Proms. The set included songs from both Silent Alarm and A Weekend in the City along with the first British live performance of "Flux".

Where else have they performed?

Answer with quotes:
the band played sets at T in the Park and Oxegen 07 that same weekend, as well as Glastonbury and the Reading