Question: Irene is the leader of the girl group formed by which company?
Context: Fromis (; initialism for From Idol School; stylized as fromis_) is an upcoming South Korean girl group formed by CJ E&M through the 2017 reality show "Idol School" on Mnet.  The group is composed of nine members: Roh Ji-sun, Song Ha-young, Lee Sae-rom, Lee Chae-young, Lee Na-gyung, Park Ji-won, Lee Seo-yeon, Baek Ji-heon and Jang Gyu-ri.  The group's name, pronounced as "promise" in Korean, also means "to keep their promise [to viewers] to be the best girl group". TrueBliss were a New Zealand pop girl group formed in April 1999.  The band were formed on the popular television show "Popstars", which aired on TV2 for nine weeks in the search for a new girl group.  TrueBliss were the first ever group to be formed under the "Popstars" banner, before the concept was sold to Australia (who formed the group Bardot in similar style), continental Europe, the UK and the United States. Pristin (Hangul: 프리스틴 ; stylized as PRISTIN and formerly known as Pledis Girlz) is a South Korean girl group formed by Pledis Entertainment in 2016.  The group is composed of ten members: Nayoung, Roa, Yuha, Eunwoo, Rena, Kyulkyung, Yehana, Sungyeon, Xiyeon and Kyla.  Most of them appeared on the television show "Produce 101" and, as the prize for becoming two of the top contestants, Nayoung and Kyulkyung went on to debut as part of the project girl group I.O.I, before reuniting with the other members to debut as Pristin on March 21, 2017, with the first mini album "Hi!  Pristin".  Like their labelmate group Seventeen, Pristin is known for writing and composing their own music. Eternal were a British R&B girl group formed in 1992 with the line-up consisting of sisters Easther and Vernie Bennett, Kéllé Bryan and Louise Nurding.  The group became an international success, selling around 10 million records worldwide.  Nurding left for a successful solo career in 1995.  Bryan was sacked in 1998 by the other two members, who gave "a breakdown in professional relations" as the reason.  The remaining duo split in 2000.  They were considered the UK's answer to the American girl group En Vogue. The Sugababes are an English girl group formed in 1998 by Siobhán Donaghy, Mutya Buena and Keisha Buchanan.  Their debut album, "One Touch", was released in the UK through London Records on 27 November 2000.  The album achieved moderate success, peaking at number 26 in April 2001 and eventually being certified Gold.  In 2001, Donaghy departed the group amid rumours of a rift with Buchanan and the group were dropped by their record label.  With the introduction of Heidi Range, former member of fellow English girl group Atomic Kitten, the group began to experience a higher level of commercial success whilst keeping the critical acclaim they had achieved with their debut album.  They released three studio albums before Buena announced her departure in December 2005, leading to Amelle Berrabah being brought in to replace her.  Following the release of their first greatest hits album, the new line-up released two studio albums.  In September 2009, after 11 years in the Sugababes, Buchanan, the final original member, was replaced by former UK Eurovision entry Jade Ewen.  Range, Berrabah and Ewen released the group's seventh studio album, "Sweet 7", in 2010, after which they signed to RCA Records, before announcing an indefinite hiatus in 2011.  In 2013, Ewen confessed that the Sugababes had split two years earlier.  The original line-up of the band reformed in 2011, under the new name Mutya Keisha Siobhan. Lovelyz (Hangul: 러블리즈 ) is a South Korean girl group formed in 2014 by Woollim Entertainment and is the company's first girl group.  The group consists of eight members: Baby Soul, Jiae, Jisoo, Mijoo, Kei, Jin, Sujeong and Yein.  Their debut album, "Girls' Invasion", was released on November 17, 2014. Red Velvet (Hangul: 레드벨벳) is a South Korean girl group formed by S.M. Entertainment.  The group debuted on August 1, 2014, with their digital single "Happiness" and with four members: Irene, Seulgi, Wendy and Joy.  In March 2015, Red Velvet added a fifth member, Yeri, to the group. Bae Joo-hyun (born March 29, 1991), better known by her stage name Irene, is a South Korean singer, television host and actress.  She is a member and leader of the South Korean girl group Red Velvet. The SeeYa (Korean: 더 씨야 ; stylized as "The SEEYA") was a South Korean R&B girl group formed by MBK Entertainment (formerly known as Core Contents Media) in 2012.  The group was a reboot of original girl group SeeYa.  The group consisted of Minkyung, Youngjoo, Yoojin and Yeonkyung.  They debuted on November 12, 2012 with their first single album "Good To Seeya" featuring the title track "Be With You".  They had their debut stage on November 15, 2012 at M!  Countdown.  In late 2015, MBK Entertainment removed their profile page from the official website and it was reported that the group was disbanded. D.Holic (Hangul: 디홀릭) was a South Korean girl group formed by Star Road Entertainment (formerly H.Mate Entertainment) in 2014 with five members.  Nine left the group in August 2015, due to personal reasons, and was replaced by new member, Hwajung.  In July 2016, it was revealed through teasers that Danbee and Duri had decided to leave the group, new member, EJ, was added to the line-up.  In February 2017, it was confirmed through a performance that members Hami and Hwajung had departed from the group.  They were temporary replaced with new members, Nayoung and Youjin, although they never officially made their debut.  In July 2017, EJ announced that she would be leaving the group to pursue a modelling career.  The group informally disbanded after the departure of all but one member, with the aim of re-debuting the remaining member, Rena, into a new girl group within a year.  The group has released one mini-album: "Chewy" (2015) and three single albums: "D.Holic Dark With Dignity" (2014), "Murphy & Sally" (2015), and "Color Me Rad" (2016).
Answer: S.M. Entertainment