Question: The lead vocalist of rock band Drug Restaurant is also a member of the cast of a South Korean variety show that airs on what network?

full_context: Document 1: Shinhwa Broadcast: Shinhwa Broadcast () is a South Korean variety television programme broadcast on general service cable channel Joongang Tongyang Broadcasting Company (jTBC). It is hosted by six-member boy band Shinhwa: Eric Mun, Lee Min-woo, Kim Dong-wan (up till April 2013), Shin Hye-sung, Jun Jin and Andy Lee (up till November 2013). The weekly programme premiered on 17 March 2012, and airs on Sundays at 23:00. The show went on hiatus after the 16 June 2013 broadcast and it returned on 3 November 2013 with a new format for season two. As of 8 December 2013, 65 episodes in two seasons have been broadcast.
Document 2: Jung Joon Young 1st mini album: Jung Joon Young 1st mini album is the debut EP by South Korean rock singer, Jung Joon-young, released by CJ E&M on October 10, 2013. It consists of six songs containing a pre-released track "병이에요 (Spotless Mind)", the title track, "이별 10분 전 (The Sense of an Ending)", and two songs that he participated in writing and composing: "아는 번호 (Missed Call)" and "Take off Mask" and other two songs "정말? (Really?)", and "Be Stupid".
Document 3: After School Club: After School Club, often shortened to ASC, is a South Korean internet-based live-music request television talk show co-hosted by Kevin Woo, Park Jimin, and Jae. K-pop idols Jang Han-byul and Eric Nam were the original main hosts of the show, and departed in January 2014 and April 2016, respectively. Debuting on April 17, 2013, it is produced by Lee Hyun-ah and airs on Arirang TV. ASC features various musical guests of South Korea and the series is directed at an international audience so the principal language is English with Korean subtitles and translations produced on air. It allows international fans of K-pop music to interact directly with the live shows through social media: fans can join in on the live broadcasts through video chats in Google Hangouts, send in tweets to the show's official Twitter account, and are also able to share comments, ask questions, and request music videos on the show's official Facebook account. The show is also available on Viki (website), a community for subtitles, Soompi, and on DramaFever.
Document 4: 2 Days &amp; 1 Night: 2 Days & 1 Night (; also known as 1 Night 2 Days; abbreviated as 1N2D) is a South Korean reality-variety show that airs on KBS2 beginning August 5, 2007. "1 Night 2 Days" is one of the two segments (the other segment is "The Return of Superman") on "Happy Sunday", airing at 6:25pm KST once a week. The episodes are also uploaded with English subtitles weekly on YouTube through KBS's official channel. The show's current cast members are Kim Jong-min, Cha Tae-hyun, Kim Joon-ho, Defconn, Yoon Shi-yoon, and Jung Joon-young. The show's motto is "Real Wild Road Variety." Its main concept is to recommend various places of interest that viewers can visit in South Korea. Filming for every new trip is usually done 2 weeks prior to broadcast on KBS2.
Document 5: Jung Jin-young (singer): Jung Jin-young (Hangul: 정진영 ; born November 18, 1991), professionally known as Jinyoung, is a South Korean singer, songwriter, record producer, and actor. He is the leader and vocalist of the South Korean boy group B1A4 under WM Entertainment, and has also gained recognition with the television series "Love in the Moonlight" (2016).
Document 6: Kang Seung-yoon: Kang Seung-yoon (born (1994--) 21, 1994 ), known as Seungyoon, is a South Korean singer-songwriter, record producer, actor, and leader of boy group Winner. In 2010, he participated in the reality television singing contest "Superstar K2" and finished in fourth place. In January 2011, he became a trainee under YG Entertainment and went on to debut as a solo artist in July 2013 and as the leader of Winner in October 2013.
Document 7: Jung Joon-young: Jung Joon-young (born February 21, 1989) is a South Korean singer-songwriter, radio DJ, host, actor, and television personality. He first gained recognition in Mnet's reality television talent show, "Superstar K4" (2012), where he finished third place. In 2013, he became the youngest member of KBS's variety show "2 Days & 1 Night" Season 3. He hosted his own radio program titled MBC FM's "Jung Joon-young's Simsimtapa" (2014) and made his big screen debut in "Love Forecast" (2015). Since 2015, Jung is the lead vocalist of rock band Drug Restaurant, previously known as JJY Band, releasing their first album "Escape to Hangover" in May 2015
Document 8: Happy Sunday: Happy Sunday (Korean: 해피 선데이 ) is a Korean reality-variety show shown on the KBS2 network, which competes directly against MBC's "Sunday Night" and SBS's "Good Sunday" line-up. Although it has been broadcast since 2003, its line-up of shows has frequently changed, with a complete revamp occurring in Spring of 2007. At that time, three new shows were introduced – "Are You Ready", "High-Five", and "Immortal Songs". Due to its poor reception, "Are You Ready" quickly evolved into "1 Night 2 Days", with most of its cast intact. In late November 2008, "Happy Sunday" had a revamp of its shows keeping "1 Night 2 Days" as the second segment and bringing back "Immortal Songs" which was previously liked by viewers. However in late March, "Immortal Songs" ended once again and was replaced with "Qualifications of Men", making "Happy Sunday" an all-male cast, with a total of 14 members. In 2013, "Qualifications of Men" was cancelled and replaced with "Star Family Show Mamma Mia". On November 3, 2013 "Star Family Show Mamma Mia" was moved to Wednesday nights and replaced with "The Return of Superman".
Document 9: Jung Yong-hwa: Jung Yong-hwa (; ] ; born June 22, 1989) is a South Korean musician, singer-songwriter, record producer and actor. He is the leader, lead vocalist and rhythm guitarist of the rock band CNBLUE. Jung made his television debut in "You're Beautiful" (2009), and has since starred in television dramas "Heartstrings" (2011), "Marry Him If You Dare" (2013) and "The Three Musketeers" (2014). In 2015, Jung made his solo debut with the album "One Fine Day".
Document 10: Kim Jong-hyun (singer): Kim Jong-hyun (born April 8, 1990), better known by the mononym Jonghyun, is a South Korean singer-songwriter, and radio host. He is a vocalist of the South Korean boy group Shinee, and has further participated in S.M. Entertainment's project group S.M. The Ballad. Jonghyun debuted as a solo artist on January 12, 2015, with his first EP, titled "Base". In the same year, on September 17, Jonghyun released a compilation album, "Story Op.1". On May 24, 2016, Jonghyun released his first studio album, "She Is", followed by his second compilation album, "Story Op.2" on April 24, 2017.
Document 11: Top Gear Korea: Top Gear Korea () is the South Korean adaptation of BBC's popular "Top Gear" show. Officially announced on 21 June 2011, the show follows a similar format with the British version and season 1 included 3 presenters: singer and professional driver Kim Jin-pyo (김진표), actor Yeon Jung-hoon (연정훈), and actor Kim Kap-soo (김갑수). It premiered on cable channel XTM on 20 August 2011.
Document 12: Drug Restaurant: Drug Restaurant (Hangul: 드럭 레스토랑), formerly known as the Jung Joon Young Band (JJY Band) (Hangul: 정준영밴드), is a Korean rock band, formed in Seoul, South Korea in 2014. The band consists of vocalist and guitarist Jung Joon-young, bassist Jung Seok-won, guitarist Jo Dae-min (Dammit), and drummer Lee Hyun-gyu (Drok. Q). The band was formed by Jung, a year after he debuted as solo singer in 2013. The band released their debut album, "Escape to Hangover", on May 27, 2015. JJY Band changed their name to Drug Restaurant on May 20, 2016, because they wanted to go with a name that focuses on the band as a whole rather than centering it around the frontman vocalist.
Document 13: Jung Joon-young discography: Jung Joon-young (born February 21, 1989) is a South Korean singer-songwriter, radio DJ, host, actor, and television personality. He first gained recognition in Mnet's reality television talent show, "Superstar K4" (2012), where he finished third place. In 2013, he became the youngest member of KBS's variety show "2 Days & 1 Night" Season 3. Since 2015, Jung is the lead vocalist of a rock band, JJY Band, which changed their name to Drug Restaurant since May 20, 2016.
Document 14: Sunday Night (South Korean TV series): Sunday Night () is the longest-running South Korean television entertainment programme airing on MBC. It runs for 175 minutes, including roughly fifteen minutes of advertising. Previously named "Big March of Sunday Night" () when it debuted in 1981, and changing its name to "Sunday Sunday Night" () in 1988, in March 2011, the show has changed its name for the second time in its history in an effort to increase its popularity again at the 5:20PM timeslot, with its rival contenders, KBS2's "Happy Sunday" and SBS's "Good Sunday". As of April 29, 2012, the name was once again changed to its most commonly known abbreviation, "Sunday Night" (일밤 ).
Document 15: Good Sunday: Good Sunday (Korean: 일요일이 좋다 ) is a South Korean reality-variety show shown on the SBS network, which competes directly against MBC's "Sunday Night" and KBS2's "Happy Sunday" line-up. The program has suffered from the competition of "Happy Sunday" and "Sunday Night" but reached its way to #1 on the Top 20 Charts every Sunday. "Good Sunday" consists of a line-up of "corner programs", or segments, which air within the program. The program ended on March 19, 2017, opting for individual programs divided into two parts for inserting commercials (which is not allowed for programs on terrestrial television).
ground_truth: KBS2