Question: Choi Jun-hong  is best known as a member of a group formed in which year ?

Passages:
I.O.I (; also known as IOI or Ideal of Idol) was a South Korean girl group formed by CJ E&M through the 2016 reality show "Produce 101" on Mnet.  The group was composed of eleven members chosen from a pool of 101 trainees from various entertainment companies: Lim Na-young, Kim Chung-ha, Kim Se-jeong, Jung Chae-yeon, Zhou Jieqiong, Kim So-hye, Yu Yeon-jung, Choi Yoo-jung, Kang Mi-na, Kim Do-yeon and Jeon So-mi.  They debuted on May 4, 2016 with the EP "Chrysalis" and actively promoted as a whole and as a sub-unit for less than a year. Choi Jun-hong (Hangul: 최준홍; born October 15, 1996) better known by his stage name Zelo, is a South Korean rapper, dancer, singer and beatboxer.  He is best known as a member of the South Korean boy group B.A.P.  He made his recording debut with the single "Never Give Up" under B.A.P's sub-unit Bang&Zelo in November 2011.  He is currently signed under TS Entertainment. 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). The Pack was a hip hop group formed in Berkeley, California in 2004.  The group consisted of Lil B (Brandon McCartney), Young L (Lloyd Omadhebo), Stunnaman (Keith Jenkins), and Lil Uno (Damonte Johnson).  They all recorded together for over a year at Young L's home studio where they released their first two mixtapes "Wolfpack Muzik Vol.  1" and "Wolfpack Muzik Vol.  2".  The Pack expanded their fanbase and eventually got signed to a major label, when Too Short signed The Pack to his Jive Records-distributed label Up All Nite Records.  The Pack is usually known for their skateboard raps and the sexually explicit content of many of their songs.  The group is best known for the track "Vans".  The Pack has also collaborated with musicians such as Soulja Boy, Wiz Khalifa, and Taymoney20. B.A.P (Korean: 비에이피; an acronym for Best Absolute Perfect) is a South Korean boy group formed in 2012 under TS Entertainment.  The group's six members are Yongguk, Himchan, Daehyun, Youngjae, Jongup, and Zelo. Hollywood Rose was an American hard rock group formed in 1983 and is best known as the precursor group for what would eventually become Guns N' Roses.  The group was founded by Axl Rose, Izzy Stradlin and Chris Weber while they were aided during live shows by Rick Mars, Johnny Kreis, Steve Darrow and Andre Troxx.  Rose, Stradlin and Weber, along with Kreis, recorded a five-song demo in 1984.  However, after a number of lineup changes, which includes Weber and Kreis being replaced by Slash and Steven Adler (both then of Road Crew) respectively as well the departure of Stradlin, the group disbanded the same year. C-REAL () is a three-member South Korean girl group formed by NAP Entertainment in 2011.  They debuted with their song "No No No No No" on October 12, 2011.  Their group name was taken from the first letter of each member's name.  They are dubbed as the "5-IU Idols" because they are produced by Choi Kab Won, who also produced IU. Boys generally Asian, also known as BgA, is a parody K-pop group formed in 2016 by YouTuber Ryan Higa, also known as nigahiga, which is his Youtube name.  The group describes itself as "guys who can’t sing, dance or really speak Korean and try to start a K-Pop band".  They released their first single "Dong Saya Dae" on May 13, 2016.  The group consists of Ryan Higa, Justin Chon, Philip Wang, David Choi, and Jun Sung Ahn. Secret (Hangul: 시크릿 ) is a South Korean K-pop girl group formed by TS Entertainment in 2009.  The group originally debuted with four-members: Jun Hyoseong, Jung Hana, Song Jieun and Han Sunhwa.  Former member Han Sunhwa officially departed from the group in October 2016.  They released their debut single "I Want You Back" October 2009.  Secret's debut single did not meet great success and it wasn't until the following year that the group saw a rise in popularity.  In 2010, Secret released two singles "Magic" and "Madonna" which earned much attention with both singles peaking at No. 2 and No. 1 respectively on the Gaon Digital Chart.  With the success of "Magic" and "Madonna", the group received the "Newcomer Award" at the 25th Golden Disk Awards.  During Secret's early days the group was known as "basement-idols" because of the poor living conditions they were in, but with their rapid success the group was able to move into better conditions. Q-Genz (formerly known as 小千金 Cute Princesses) is a 4-member girl group formed in 2005 by a Malaysian company called Wayang Tinggi (威揚).  Their ages ranged from 4–5 years at debut.  Their first public appearance was in Four Golden Princess's 11th Year Concert.  They released their first album 送你一個大年糕 (English Translation:Give You A Big New Year Cake) under the group name 小千金.  A fortune teller recommended their record company to change the group's name to 巧千金 for better luck and success.  The group celebrate their 10th year as a group and was later renamed Q-Genz in 2015.

Supporting sentences:
 He is best known as a member of the South Korean boy group B.A.P. B.A.P (Korean: 비에이피; an acronym for Best Absolute Perfect) is a South Korean boy group formed in 2012 under TS Entertainment.