Question: Who directed the film in which  Lee Min-ho has his first leading role? 

full_context: Document 1: Lee Min-hyuk: Lee Min-hyuk (; born November 29, 1990), commonly known as Minhyuk or Heota, is a South Korean singer, rapper, songwriter and actor. He is a member of the South Korean boy group BtoB. He received multiple supporting roles in television series such as "A New Leaf" and "Sweet, Savage Family".
Document 2: Lee Min-ho (actor, born 1987): Lee Min-ho (, born June 22, 1987) is a South Korean actor and singer. He first gained widespread fame in Korea and parts of Asia with his role as Gu Jun-pyo in "Boys Over Flowers" in 2009. The role won him a Best New Actor award at the 45th Baeksang Arts Awards. He is noted for his leading roles in "City Hunter" (2011), "The Heirs" (2013) and "The Legend of the Blue Sea" (2016). The success of Lee's television dramas throughout Asia established him as a top Hallyu star. Lee starred in his first leading role in film with "Gangnam Blues" (2015), followed by his first China-produced film "Bounty Hunters" (2016).
Document 3: Inside Men (film): Inside Men () is a 2015 South Korean neo noir political crime action film written and directed by Woo Min-ho based on Yoon Tae-ho's webtoon "The Insiders" that dissects the corruption within Korean society. Starring Lee Byung-hun, Jo Seung-woo and Baek Yoon-sik, it began filming in July 2014 and was released in theaters on November 19, 2015.
Document 4: Real (2017 film): Real () is a South Korean action thriller noir film directed by Lee Sa-rang, starring Kim Soo-hyun, Sung Dong-il, Lee Sung-min, Choi Jin-ri and Jo Woo-jin. The film was released on June 28, 2017 in South Korea.
Document 5: Lee Tae-min: Lee Tae-min (born July 18, 1993), better known by the mononym Taemin, is a South Korean singer and actor. He debuted as a vocalist of the group Shinee in May 2008 under S.M. Entertainment. He began his acting career in 2009 with MBC's comedy "Tae Hee, Hye Kyo, Ji Hyun" as Junsu.
Document 6: Woo Min-ho: Woo Min-ho (born 1971) is a South Korean film director and screenwriter. Woo debuted with the revenge thriller "Man of Vendetta" (2010), followed by the action comedy thriller "The Spies" (2012), both starred Kim Myung-min in the lead. His latest political thriller "Inside Men" (2015), based on Yoon Tae-ho's webtoon "The Insiders" which focused on the corrupt systems existing in Korea, the film focused on the intense competition between the characters themselves. Starring Lee Byung-hun, it was a hit with more than 5.7 million admissions as of December 12, 2015.
Document 7: 1987 (2017 film): 1987 is an upcoming South Korean political drama film directed by Jang Joon-hwan, starring Kim Yoon-seok, Ha Jung-woo, Yoo Hae-jin and Kim Tae-ri.
Document 8: Ha Jung-woo: Ha Jung-woo (born Kim Sung-hoon on March 11, 1978) is a South Korean actor, film director, screenwriter and film producer. His breakthrough to stardom came with the role in Na Hong-jin's serial killer film "The Chaser" (2008). One of the leading actors of his generation in Korean cinema, Ha Jung-woo showcased his versatility across movies from many genres: road movie "My Dear Enemy" (2008), sports film "Take Off" (2009), crime drama "The Yellow Sea" (2010), gangster saga "" (2012), romantic comedy "Love Fiction" (2012), spy thriller "The Berlin File" (2013), and action thriller "The Terror Live" (2013). He made his directorial debut through the comedy film "Fasten Your Seatbelt" (2013), followed by "Chronicle of a Blood Merchant" (2015).
Document 9: Choi Min-ho (entertainer): Choi Min-ho (born (1991--) 09, 1991 ), better known by the mononym Minho, is a South Korean singer and actor. He debuted as a member of South Korean boy group Shinee in May 2008. Aside from group activities as singer, he has debuted as an actor in November 2010 in a KBS2's drama special, entitled "Pianist". He has since had roles in various television dramas such as SBS's sitcom, "Salamander Guru and The Shadows" (2012), "To the Beautiful You" (2012), "Medical Top Team" (2013), "Because It's The First Time" (2015) and "" (2016). He made his big screen debut in 2016 with the movie "Canola".
Document 10: Nameless Gangster: Rules of the Time: Nameless Gangster: Rules of the Time (; literally: "War on Crime: The Golden Age of the Bad Guys") is a 2012 South Korean gangster film directed by Yoon Jong-bin starring Choi Min-sik and Ha Jung-woo. The film is set in the 1980s and ’90s in Busan when corruption and crime was so rampant that the government declared war on it in 1990.
Document 11: Gangnam Blues: Gangnam Blues (; lit. Gangnam 1970) is a 2015 South Korean noir action film written and directed by Yoo Ha, and starring Lee Min-ho and Kim Rae-won. The film is set in the 1970s against the backdrop of the real estate development of Seoul's Gangnam district amidst socio-political turmoil and terrorism. The friendship of two childhood friends is tested as they find themselves entangled in the collusion and battles between political powers and criminal organizations.
Document 12: Lee Min-ho (actor, born 1993): Lee Min-ho (Hangul: 이민호 ; Hanja: 李敏豪 ) (born June 28, 1993) is a South Korean actor. He is well known for his role as young Yang Myung in "Moon Embracing the Sun" (2012) and Song Mang-boo in "Rooftop Prince" (2012).
Document 13: Boom (entertainer): Lee Min-Ho (born May 10, 1982), better known as Boom (Hangul: 붐), is a South Korean rapper, singer, actor, radio host, and television presenter. He has made numerous television appearances in South Korean comedy shows and has acted in sitcoms as well.
Document 14: Gong Yoo: Gong Ji-chul (; born July 10, 1979), better known by his stage name Gong Yoo (), is a South Korean actor. He is best known for his roles in television dramas "The 1st Shop of Coffee Prince" (2007) and "" (2016-2017), and the films "Silenced" (2011), "The Age of Shadows" (2016), and "Train to Busan" (2016).
Document 15: Yeo Jin-goo: Yeo Jin-goo (born August 13, 1997) is a South Korean actor. Yeo began his career as child actor, debuting in the film "Sad Movie" (2005). Nicknamed "Nation's Little Brother", he went on to play the younger version of the lead roles in movies and television dramas such as "A Frozen Flower" (2008), "Giant" (2010), "Moon Embracing the Sun" (2012), and "Missing You" (2012). He is known for playing the title character in action thriller "" (2013), for which he won Best New Actor at the Blue Dragon Film Awards.
ground_truth: Yoo Ha