Question: What company does this singer-songwriter and record producer who worked with this South Korean boy group whose name describes its concept of having multi-sub units based in various cities worldwide?
Context: NCT (Hangul: 엔시티) is a South Korean boy group formed by S.M. Entertainment.  Their name stands for the Hallyu localization project Neo Culture Technology, a term coined by S.M. Entertainment founder Lee Soo-man to describe the group's concept of having an unlimited number of members divided into multiple sub-units based in various cities worldwide. This is the discography of South Korean boy group Seventeen.  Seventeen (Hangul: 세븐틴), also stylized as SEVENTEEN or SVT, is a South Korean boy group formed by Pledis Entertainment in 2015.  They have released one album and four EPs. Jung Il-hoon (; born October 4, 1994), simply known as Ilhoon, is a South Korean rapper, songwriter, record producer, and actor.  He is the main rapper of the South Korean boy group BtoB.  He is well known for his multiple song featurings with artists such as Hyuna and G.NA and as an assistant MC in the variety show "Weekly Idol".  Ilhoon made his acting debut as he starred in the drama "Webtoon Hero: Tundra Show" in 2015.  He was also known for inventing and popularizing the gestures for "Gwiyomi Player". 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". Yong Jun-hyung (born December 19, 1989), commonly known as Junhyung and also known as Poppin' Dragon and Joker, is a South Korean singer-songwriter, rapper, record producer, and actor.  He is a member of South Korean boy group Highlight. 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). Kim Han-bin (Hangul: 김한빈 ; born October 22, 1996), better known by his stage name B.I (Hangul: 비아이 ), is a South Korean rapper, songwriter, and record producer.  He is the leader of the South Korean boy group iKON, signed under YG Entertainment. Yoo Young-jin (Hangul: 유영진; Hanja: 劉英振) is a singer-songwriter and record producer for various S.M. Entertainment artists.  He has produced and written songs for H.O.T., S.E.S, BoA, Shinhwa, TVXQ, The Grace, Super Junior, Girls' Generation, Shinee, f(x), EXO, Red Velvet, and NCT. Kim Nam-joon (Hangul: 김남준 ; born September 12, 1994), better known as Rap Monster, is a South Korean rapper, songwriter, and record producer.  He is the main rapper and songwriter of the South Korean boy group BTS, managed under Big Hit Entertainment.  In 2015, he released his first solo mixtape, "RM".  To date, he has recorded with artists such as Wale, Warren G, Gaeko, Krizz Kaliko, MFBTY, and Primary. Bang Yong-guk (born March 31, 1990), better known mononymously as Yongguk, is a South Korean rapper, songwriter and record producer.  He is best known as the leader of the South Korean boy group B.A.P under TS Entertainment.
Answer: S.M. Entertainment