Question: Kim Dong-won's directorial debut was a film that is a sequel to which 2001 film ?

Context articles: Cho Ui-seok
Everybody Says I'm Fine!
City of Damnation
R2B: Return to Base
Kim Ki-duk (director, born 1934)
Unstoppable Marriage
My Boss, My Teacher
Kim Dong-won
Kim Dong-won (director, born 1962)
Kim Dong-won (filmmaker, born 1955)

Cho Ui-seok (born January 1, 1976) is a South Korean film director and screenwriter.
 Cho made his debut with the action comedy "Make It Big" (2002), making him one of the youngest directors in Korea at the age of 26.
 With dynamic set of characters and by tackling a conventional genre in a witty way, Cho was immediately in the spotlight upon the film's release.
 His third feature is the smash hit investigation thriller "Cold Eyes" (2013).
 His fourth film was the star-studded thriller "Master" (2016), featuring Lee Byung-hun, Kang Dong-won and Kim Woo-bin.
 Released in December, it grossed USD 34 million with 4.9 million total admissions, making it the No. 11 bestselling film for 2016 in Korea.
Everybody Says I'm Fine!
 is an Indian film, released on 12 September 2001 at the Toronto Film Festival.
 It marks the directorial debut of Indian actor Rahul Bose.
 For his work on "Everybody Says I'm Fine!"
 Bose won the runner-up John Schlesinger Award for best directorial debut at the 2003 Palm Springs International Film Festival.
City of Damnation (Hangul: 유감스러운 도시 ; RR: "Yoogamseureowoon dosi "; MR: "Yugamsŭrŏun tosi " ) is a 2009 South Korean film directed by Kim Dong-won and is a remake of the 2002 Hong Kong film "Infernal Affairs".
R2B: Return to Base () is a 2012 South Korean aviation action drama film loosely based on the critically acclaimed 1986 film Top Gun.
 The film stars Rain, Shin Se-kyung and Yoo Jun-sang in lead roles.
 It was directed by Kim Dong-won and is a remake of Shin Sang-ok's 1964 film "Red Scarf".
 It is about a talented, yet troublemaking, elite air force pilot who is demoted to a combat flying unit.
 It was released on 15 August 2012.
 Republic of Korea Air Force was heavily involved to support filming.
Kim Ki-duk (29 September 1934 – 7 September 2017) was a South Korean film director and professor.
 Best known outside of Korea for his 1967 giant monster film "", Kim Ki-duk directed 66 movies in total from his directorial debut in 1961 until his retirement from the film industry in 1977.
 Along with Kim Soo-yong and Lee Man-hee, Kim was one of the leading young directors of the Korean cinematic wave of the 1960s.
 The most distinctive and successful genre of this period was the melodrama (청춘영화 - "cheongchun yeonghwa").
 He is not related to Kim Ki-duk, the South Korean director of "3-Iron".
Unstoppable Marriage is a 2007 South Korean romantic comedy film.
 It stars veteran actors Kim Soo-mi and Im Chae-moo alongside popstar and television actress Eugene and Ha Seok-jin.
 The film is Eugene's big screen debut, and is also the directorial debut of Kim Seong-wook, who previously worked as an assistant director on other films such as "Fun Movie" (2002), "My Teacher, Mr. Kim" (2003) and "Lovely Rivals" (2004).
My Boss, My Teacher () is a 2006 South Korean film and sequel to the 2001 film "My Boss, My Hero".
 It was followed by "The Mafia, The Salesman" in 2007.
Kim Dong-won () is a Korean name consisting of the family name Kim and the given name Dong-won, and may also refer to:
Kim Dong-won (born 1962) is a South Korean film director and screenwriter.
 Kim's directorial debut – the comedy film "My Boss, My Teacher" was a hit with more than 6.1 million admissions, making it the fourth best selling film of 2006.
Kim Dong-won (born February 24, 1955) is a South Korean documentary filmmaker.
 Kim is best known for his documentary films "Repatriation" (2004) and "63 Years On" (2008).