Question: In what year did the boy group led by Kang Seung-yoon debut?
Context: "Warrior" (Korean: 워리어) is a song recorded by South Korean boy group B.A.P.  It is released as a digital single on January 26, 2012 through TS Entertainment.  The song served as B.A.P's debut single, the first from their self-titled debut album.  "Warrior" was written and produced by Kang Ji-on and Kim Ki-bum, the same producers of Song Ji-eun's Going Crazy and Bang & Zelo's "Never Give Up".  B.A.P's leader, Bang Yong-guk also participated in the song's production by co-writing "Warrior".  The song's lyrics describes the injustice of the current society and how the protagonist's desire to end it. Ma Chao (176–222), courtesy name Mengqi, was a military general and warlord who lived in the late Eastern Han dynasty and early Three Kingdoms period.  A descendant of the general Ma Yuan, Ma Chao was the eldest son of Ma Teng, a prominent warlord in Liang Province (covering parts of northwestern China).  In 211, he formed a coalition with Han Sui and other northwestern warlords and revolted against the Han central government, which was led by the warlord Cao Cao.  The coalition broke up after losing the Battle of Tong Pass against Cao Cao's forces.  Ma Chao initially retreated, but later returned to attack and seize control of Liang Province by killing the provincial inspector Wei Kang and forcing Wei Kang's subordinates to submit to him.  About a year after Ma Chao started his uprising, Emperor Xian issued an imperial decree ordering the execution of Ma Chao's family members, who were in Ye city at the time.  In the meantime, Wei Kang's subordinates, led by Zhao Ang, Yang Fu and others, rebelled against Ma Chao and forced him out of Liang Province.  Ma Chao retreated to Hanzhong Commandery, where he borrowed troops from the warlord Zhang Lu, and returned to attack Liang Province but was ultimately defeated and driven back.  Ma Chao took shelter under Zhang Lu for a while until around 214, when he heard that the warlord Liu Bei was fighting for control over Yi Province (covering present-day Sichuan and Chongqing) with Yi Province's governor, Liu Zhang.  He defected to Liu Bei's side and assisted Liu Bei in capturing Yi Province from Liu Zhang.  Ma Chao had served as a general under Liu Bei since then and participated in the Hanzhong Campaign in 219.  He died in 222. Love for a Thousand More (Hangul: 천년째 연애중 ; Hanja: 千年恋爱中 ; RR: "cheonnyeonjjae yeon-aejung " ) is a South Korea web series starring Kang Seung-yoon and .  The drama is aired every Monday, Wednesday and Friday at 11:00 (KST) starting from December 5, 2016 till December 23, 2016 on Naver TV Cast (South Korea), YG Entertainment's YouTube Channel (International) and Miaopai (China). Kang Nam-gil (born August 27, 1958) is a South Korean actor.  Kang made his acting debut as a 9-year-old child actor in 1966.  He later transitioned to adult roles in 1981 with "Let Us Love" written by Kim Soo-hyun (and dropped out of Hanyang University's English Language and Literature department).  Kang drew popularity when he starred in the family drama "Under the Same Roof" in 1986, but became best known for playing "Dal-soo" in the single-episode "MBC Best Theater", which used his character to satirize the social issues of the day.  "The Trial of Dal-soo" reached 25.7% viewership ratings, the highest in the anthology series' history.  In 2000, Kang and his wife divorced on charges of adultery on her part, and his subsequent hospitalization from a heart attack led him to take a hiatus from his acting career and move with his son and daughter to England.  He returned to Korea four years later, and made his comeback with "People of the Water Flower Village".  Kang is also an author of computer books for beginners, and in 2004 he published "Oh!  My God", a memoir about his life as a stay-at-home dad in Birmingham.  In 2008, he played one of the leading roles in the spirit possession dramedy "Who Are You? ". Victon (Korean: 빅톤 ; stylized as VICTON, an acronym for Voice to New World), is a South Korean boy group formed by Plan A Entertainment in 2016.  The group consists of Han Seung-woo, Kang Seung-sik, Heo Chan, Lim Se-jun, Do Han-se, Choi Byung-chan and Jung Su-bin, and made their debut on November 9, 2016 with the extended play "Voice to New World". SF9 (Korean: 에스에프나인 ; shortened from Sensational Feeling 9) is a South Korean boy group formed by FNC Entertainment.  SF9 is the company's first dance boy group to ever debut.  SF9 debuted on October 5, 2016 with the release of their first single album "Feeling Sensation". Kang Sung-hoon (hangul:강성훈, born February 22, 1980) is a South Korean singer from the 90's South Korean boy group Sechs Kies.  Sung-hoon is the main vocalist of SechsKies and is referred to having the best singing voice of the group.  After Sechskies had disbanded in 2000, Sung-hoon pursued a solo singing career, signed under Laful Entertainment at the time.  His nickname Hoony is the title for his third album and his official fan club is called Hoony World. Winner (Hangul: 위너), often stylized as WINNER, is a South Korean boy group formed in 2013 by YG Entertainment and debuted in 2014.  It currently consists of four members, Jinwoo, Seunghoon, Mino and Seungyoon.  Originally a five-piece group with Taehyun, who later departed from the group in November 2016. We Broke Up () is a South Korean web series based on the webtoon of the same name, starring Sandara Park and Kang Seung-yoon (both from YG Entertainment). 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.
Answer: 2014