Question: What company formed Son Seung-wan's girl group?

Context paragraphs:
Black Pearl (K-Pop Group): Black Pearl (Hangul: 블랙펄) was a South Korean girl group official made up of Oh Nami, Hwl Eun, Young Joo, and Mikka.  When the group debuted in 2007 they marketed as the new girl group to dominate the girl group charts in the following years of 2007 and 2008 alongside some artist Wonder Girls, and Kara.  They were also known to follow the steps of SG Wannabe, SeeYa, and M2M.  In 2009 Mikka left due to personal reasons.  New member Jung Min was added by 2010 or 2011.  As for the 2010 and therefore the group only consisted of the following 4 until their disbandment in 2012.

The Get Weird Tour: The Get Weird Tour was the third concert tour by British girl group Little Mix, in support of their third studio album, "Get Weird".  The tour was announced in July 2015.  It began on 13 March 2016 in Cardiff and ended on 27 August 2016 in Newmarket.  It took place in Europe, Oceania and Asia with a total of 60 shows.  It also became the 5th highest grossing girl group tour of all time and this decade's highest grossing girl group tour.

GP Basic: GP Basic (Korean: 지피 베이직 ) was a South Korean girl group who debuted on August 15, 2010.  At the time of their debut, they were considered to be the "youngest" South Korean girl group with an average age of below 13.5.  The age of their youngest member, Janey, caused controversy followed by the debut of a much younger girl group, G-story, who were all below 10 years old.  This led to new broadcasting regulations in South Korea.

D.Holic: 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).

TrueBliss: 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.

Red Velvet (band): 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.

Uncle Tupelo: Uncle Tupelo was an alternative country music group from Belleville, Illinois, active between 1987 and 1994.  Jay Farrar, Jeff Tweedy, and Mike Heidorn formed the band after the lead singer of their previous band, The Primitives, left to attend college.  The trio recorded three albums for Rockville Records, before signing with Sire Records and expanding to a five-piece.  Shortly after the release of the band's major label debut album "Anodyne", Farrar announced his decision to leave the band due to a soured relationship with his co-songwriter Tweedy.  Uncle Tupelo split on May 1, 1994, after completing a farewell tour.  Following the breakup, Farrar formed Son Volt with Heidorn, while the remaining members continued as Wilco.

Wendy (singer): Son Seung-wan (born February 21, 1994), known professionally as Wendy, is a South Korean singer.  She is a member of the South Korean girl group Red Velvet.

Lovelyz: 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.

Lee Hae-in (singer): Lee Hae-in (born July 4, 1994) is a South Korean singer and actress.  She debuted in project girl group I.B.I, a project girl group that consists of Produce 101 eliminated contestants formed by LOEN Entertainment, which debuted in August 2016.  In 2017, she joined another survival girl group show, Idol School as a contestant.

Supporting paragraphs: Red Velvet (band) Wendy (singer)
Answer: S.M. Entertainment