Question:  JJ Project was formed by JYP Entertainment and debuted as a part of a seven member group whose first EP peak at number one on which "Billboards" chart?

Context articles: Twice (band)
Committee for Peace and Security in the Gulf
Verse 2
Got7
JJ Project
Got7 discography
Twicecoaster: Lane 1
Jia (singer)
Day6
Twice discography

Twice (; Japanese: トゥワイス) is a South Korean girl group formed by JYP Entertainment through the 2015 reality show "Sixteen".
 The group is composed of nine members: Nayeon, Jeongyeon, Momo, Sana, Jihyo, Mina, Dahyun, Chaeyoung, and Tzuyu.
 The group debuted on October 20, 2015 with the extended play (EP) "The Story Begins".
The Committee for Peace and Security in the Gulf (CPSG) was a "bipartisan group whose members are prominent in U.S. international policy circles... The 39-member group, organized as the Committee for Peace and Security in the Gulf, included former U.S. Rep., the late Stephen Solarz of New York, who was a member of the House Foreign Affairs Committee and Richard Perle, a former assistant defense secretary for international security policy."
 
Verse 2 is the first extended play by South Korean male duo JJ Project.
 It was released on July 31, 2017 under JYP Entertainment and incorporates a variety of genres like pop, hip-hop and rock.
 The album contains eight tracks, two out of the eight songs are only available on the physical release.
 The track "Tomorrow, Today" was chosen as the lead single for the promotional cycle.
Got7 () is a South Korean boy group formed by JYP Entertainment.
 The group is composed of seven members: JB, Mark, Jackson, Jinyoung, Youngjae, BamBam, and Yugyeom.
 Got7 debuted in January 2014 with the release of their first EP "Got It?
", which peaked at number two on the Gaon Album Chart and number one on "Billboard's" World Albums Chart.
 The group gained attention for their stage performances, which include elements of martial arts tricking.
JJ Project (Korean: 제이제이 프로젝트 ) is a South Korean pop duo, consisting of JB and Jinyoung.
 They were formed by JYP Entertainment and released their first single "Bounce" in May 2012.
 They debuted as a part of Got7 in January 2014.
Got7, a hip hop boy group based in South Korea, have released three studio albums, six EPs, thirteen singles, and two box sets. Formed by JYP Entertainment in 2013, Got7 made their debut in January 2014 with the EP "Got It?
", which debuted at number two on the Gaon Albums Chart.
 The EP's lead single "Girls Girls Girls" peaked at number 21 on the Gaon Singles Chart.
 In October 2014, Got7 debuted in Japan with their first Japanese-language release "Around the World", peaking at number three on the Oricon's singles charts.
 A month later, Got7 returned to Korea to release their first full-length album "Identify", and topped album charts.
Twicecoaster: Lane 1 (stylized as TWICEcoaster : LANE 1) is the third extended play (EP) by South Korean girl group Twice.
 The EP was released digitally and physically on October 24, 2016 by JYP Entertainment and distributed by KT Music.
 It contains seven tracks, including the lead single "TT" (refers to the emoticon used to express crying or sadness).
 The EP is the highest selling K-pop girl group album of 2016, which sold 350,852 units at year-end.
Meng Jia (), simply known as Jia, is a Chinese singer and actress mostly active in South Korea and China.
 She was a member of the JYP Entertainment's girl group Miss A.
 In May 2016, Jia left the group after her contract with JYP Entertainment expired.
 To pursue her solo activities in China, Meng Jia signed a contract with Banana Culture Music in 2016.
Day6 (, stylized as DAY6) is a South Korean rock band formed by JYP Entertainment.
 The band's current line-up consists of five members: Jae, Sungjin, Young K, Wonpil, and Dowoon.
 The band debuted with the release of their first EP, "The Day" on September 7, 2015.
South Korea-based girl group Twice have released four extended plays (one of which was reissued under a different title), one compilation album, one compilation EP, and five singles.
 Formed by JYP Entertainment in 2015 through the survival show "Sixteen", Twice debuted in October 2015 with the release of their first EP, "The Story Begins", and its single "Like Ooh-Ahh".
 The EP and the single peaked at No. 3 and No. 10 on the Gaon Music Chart, respectively.
 "The Story Begins" eventually sold over 120,000 copies, becoming the best-selling debut extended play by a K-pop girl group of all time, breaking the record set by Girls' Generation's first extended play "Gee" (2009), which sold nearly 100,000 copies.