Question: What type of band were Supergrass and 7 Year Bitch?

full_context: Document 1: The Supergrass: The Supergrass is a 1985 British comedy film written and directed by Peter Richardson. The film starred Richardson, Adrian Edmondson, Jennifer Saunders, Dawn French, Keith Allen, Nigel Planer, Alexei Sayle, Ronald Allen and Robbie Coltrane.
Document 2: Valerie Agnew: Valerie Agnew is best known for her relationship with the band called the Gits and as the drummer of 7 Year Bitch. She started out in Ohio and was dating Steve Moriarty, the drummer of the Gits. She was a very close friend of Mia Zapata. The Gits, when they moved to Seattle Valerie went along with them, since she was good friends with them. When Valerie comes to Seattle she meets up with the musicians that would soon to be her future band mates Selene Vigil (vocals), Elizabeth Davis (bass) and Stefanie Sargent (lead guitar), forming the band 7 Year Bitch. Eventually signing with C/Z Records when they made their debut album "Sick 'Em" in 1992.
Document 3: ¡Viva Zapata!: ¡Viva Zapata! is the second album by the American punk band 7 Year Bitch. It was released June 28, 1994 on Seattle-based C/Z Records. It was their first record to feature new guitarist Roisin Dunne who had replaced Stefanie Sargent in 1992. The album's title is in tribute to The Gits' vocalist, and friend of the group, Mia Zapata, who was raped and strangled to death in July 1993. Some of the songs on this album relate to Zapata's murder directly (such as "M.I.A.", which encourages vigilante justice for her killer) as well as Sargent's death by drug overdose ("Rock A Bye").
Document 4: Mia Zapata: Mia Katherine Zapata (August 25, 1965 – July 7, 1993) was the lead singer for the Seattle punk band The Gits.
Document 5: Supergrass: Supergrass were an English rock band, formed in 1993 in Oxford. The band consisted of brothers Gaz (guitar and lead vocals) and Rob Coombes (keyboards and backing vocals), Mick Quinn (bass and backing vocals) and Danny Goffey (drums and backing vocals).
Document 6: Bad Blood (Supergrass song): "Bad Blood" is the second single from British rock group Supergrass' sixth album, "Diamond Hoo Ha". It was released on 17 March 2008, which was one week before the album's release date. The song is about a rough night out in Reykjavík, Iceland, as Gaz Coombes explains;
Document 7: The Gits: The Gits were an American punk rock band, formed in Yellow Springs, Ohio in 1986. Known for their part in the burgeoning Seattle music scene of the early 1990s, they were known for their fiery live performances. Members included singer Mia Zapata, guitarist Joe Spleen (born Andy Kessler), bassist Matt Dresdner and drummer Steve Moriarty. They dissolved in 1993 after the murder of Zapata.
Document 8: Sick 'Em: Sick 'Em is an album by Seattle punk rock band 7 Year Bitch. It was released in October 1992 on the local C/Z Records label and collected all of the band's previous releases up to that point onto one record. The album was originally slated for an earlier release date but was delayed following the death of guitarist Stefanie Sargent in June 1992.
Document 9: Roisin Dunne: Roisin Dunne Ross (born 18 September 1965 in Ireland), an Irish musician. Best known for being the replacement guitarist of 7 Year Bitch, after their guitarist Stefanie Sargent died. In 1992, they toured for their debut, with Valerie Agnew, Selene Vigil-Wilk, and Elizabeth Davis, which was her signature act with the band. This was when Mia Zapata of the Gits had been raped and murdered on 7 July 1992. The band had made a tribute album to her and Sargent.
Document 10: Moving (Supergrass song): "Moving" is a song by Supergrass, from their eponymous third album, "Supergrass" (1999). It was also released as a single, reaching #9 in the UK Singles Chart. It is about the tedium of touring as a band. It was the last song by Supergrass to reach the UK Top 10.
Document 11: 7 Year Bitch: 7 Year Bitch was an American punk rock band from Seattle, Washington that was active for 7 years, between 1990 and 1997. Their career yielded three albums, and was impacted by the deaths of their guitarist Stefanie Sargent and close friend Mia Zapata, of fellow Seattle punks The Gits.
Document 12: Gaz Coombes: Gareth "Gaz" Michael Coombes (born 8 March 1976 in Oxford) is an English musician and singer-songwriter, best known as the lead vocalist and guitarist of the English alternative rock band Supergrass. He first entered the music scene aged sixteen as the lead singer of the band The Jennifers which featured Supergrass bandmate Danny Goffey. Coombes was noticeable for his large sideburns during the 1990s.
Document 13: I Should Coco: I Should Coco is the debut studio album by English alternative rock band Supergrass, released through Parlophone in May 1995. Supergrass were formed in 1993 by Gaz Coombes, Mick Quinn and Danny Goffey and they released their debut single from the album, "Caught by the Fuzz", in May 1995 on the small independent local label Backbeat Records and was re-released with Parlophone. The title of the album is cockney rhyming slang for "I should think so".
Document 14: Lisa Faye Beatty: Lisa Faye Beatty (October 15, 1964 – November 25, 2011) was best known for her involvement in the band 7 Year Bitch. She replaced the guitarist Roisin Dunne in 1997. The band later broke up the same year. She was killed in a traffic collision in November 2011.
Document 15: Supergrass discography: The discography of Supergrass, an English alternative rock band, consists of six studio albums, three extended plays, two compilation albums, 26 singles and 24 music videos. They were formed in 1993 by Gaz Coombes, Mick Quinn and Danny Goffey. Rising to prominence during the Britpop era in the mid-1990s with their single "Alright", they were joined by Rob Coombes in 2002 (keyboards) until their demise on 11 June 2010.
ground_truth: rock band