Question: Ryu Seung-soo was in the 2011 war film directed by whom?

full_context: Document 1: Lee Byung-hun: Lee Byung-hun (Korean: 이병헌 ; born July 12, 1970) is a South Korean actor, singer and model. He has received critical acclaim for his work in a wide range of genres, most notably "Joint Security Area" (2000); "A Bittersweet Life" (2005); "The Good, the Bad, the Weird" (2008); the television series "Iris" (2009); "I Saw the Devil" (2010); and "Masquerade" (2012). His critically acclaimed film "Inside Men" (2015) won him the Best Actor prize in three prestigious award ceremonies: 52nd Baeksang Art Awards, 37th Blue Dragon Awards and 53rd Grand Bell Awards—a feat that was unbroken since 2004. Lee has five films—"Joint Security Area", "The Good, the Bad, the Weird", "Masquerade", "Inside Men" and "Master"—on the list of highest-grossing films in South Korea.
Document 2: 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 3: Rough Cut (2008 film): Rough Cut (; lit. "A Movie is a Movie") is a 2008 South Korean action crime film. It is the debut feature of director Jang Hoon and based on an original story by Kim Ki-duk. The film had a total of 1,307,688 admissions nationwide.
Document 4: Park Hoon-jung: Park Hoon-jung is a South Korean film director and screenwriter. Park first attracted notice within the Korean film industry for writing the screenplays for Kim Jee-woon's "I Saw the Devil" (2010) and Ryoo Seung-wan's "The Unjust" (2010). He made his debut as a director in 2011 with the period film "The Showdown", which was largely overlooked by Korean viewers upon its release. However with his second film, gangster epic "New World" (2013), he scored a critical and commercial success.
Document 5: 71: Into the Fire: 71: Into the Fire (Korean: 포화 속으로 ) is a 2010 South Korean war drama film directed by John H. Lee. The film was made in commemoration of those who fought during the Korean War, to raise awareness of the existence and importance of the student-soldiers during that period.
Document 6: Cha Seung-won: Cha Seung-won (born 7 June 1970) is a South Korean actor who his career as an in-demand fashion model in the 1990s. Cha achieved stardom through the hit comedy films "Kick the Moon" (2001); "Jail Breakers" (2002); "My Teacher, Mr. Kim" (2003); and "Ghost House" (2004). After proving his versatility in other genres, notably in the period thriller "Blood Rain" (2005) and the melodrama "My Son" (2007), Cha's popularity continued with the television series "Bodyguard" (2003), "City Hall" (2009), and "The Greatest Love" (2011).
Document 7: Battlefield Heroes (film): Battlefield Heroes () is a 2011 South Korean war comedy film directed by Lee Joon-ik. The film is a sequel to the 2003 film "Once Upon a Time in a Battlefield" and stars Jung Jin-young, Lee Moon-sik and Ryu Seung-ryong. The film is set in 668 and chronicles the war between the southern Korean state of Shilla against the larger northern Korean state of Goguryeo. The film's box office returns were lower than expected in South Korea, which prompted Lee Joon-ik to announce his retirement shortly after the film's release. The film has been shown at the New York Asian Film Festival and Fantasia Festival.
Document 8: Ryu Seung-ryong: Ryu Seung-ryong (born November 29, 1970) is a South Korean actor. Ryu began his acting career in theater, subsequently becoming one of the most versatile supporting actors in Korean film and television. In 2013, he headlined "Miracle in Cell No. 7", which became (at the time) the third highest grossing Korean film of all time.
Document 9: Jang Hoon: Jang Hoon (born May 4, 1975) is a South Korean film director. He directed the films "Rough Cut" (2008), "Secret Reunion" (2010), "The Front Line" (2011), and "A Taxi Driver" (2017).
Document 10: Ryu Seung-soo: Ryu Seung-soo (born August 12, 1971) is a South Korean actor. Ryu made his acting debut in 1997 with a minor role in Park Chan-wook's film "Trio", and has been active as a supporting actor on film and television since. Among his notable films are the monks-versus-gangsters comedy "Hi! Dharma!" (2001), "kimchi" western "The Good, the Bad, the Weird" (2008), and Korean War movie "The Front Line" (2011). He also appeared on TV in the quirky series "Evasive Inquiry Agency" (also known as "Four Gold Chasers", 2007), revenge drama "The Chaser" (2012), and power-struggle saga "Empire of Gold" (2013).
Document 11: Kim Yoon-seok: Kim Yoon-seok (born January 21, 1968) is a South Korean actor. Kim's theater background first led him to be cast in minor roles on film and television. His breakout role came as the villain in gambling film "" (2006), but it was his performance as an ex-cop turned pimp in surprise hit "The Chaser" (2008) that brought him acting awards and stardom in his forties. Kim has since become an acclaimed leading actor, along with Choi Min-sik, Song Kang-ho, Sol Kyung-gu, Hwang Jung-min, Ha Jung-woo, in terms of acting talent and box office guarantee in Korean cinema, in films such as "Running Turtle" (2009), "The Yellow Sea" (2010), "Punch" (2011),"The Thieves" (2012), "" (2013), "Sea Fog" (2014), "The Classified File" (2015) and "The Priests" (2015).
Document 12: 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 13: The Front Line (2011 film): The Front Line (; also known as "Battle of Highlands") is a 2011 South Korean war film directed by Jang Hoon, set during the 1953 ceasefire of the Korean War. This is the third film by director Jang Hoon, after completing "Secret Reunion" and "Rough Cut". It was selected as South Korea's submission to the 84th Academy Awards for Best Foreign Language Film, but did not make the final shortlist. It also won four Grand Bell Awards, including Best Film.
Document 14: The Finishing Line: The Finishing Line is a short film produced in 1977 by British Transport Films, warning about the dangers children face on railway lines. Although it is not strictly a public information film, it is often considered to be so by fans of the genre. It was broadcast in its entirety several times on television, but was so controversial that it was replaced less than two years later by the slightly less graphic "Robbie". It won at least two creative awards: Certificate of Appreciation (Top Category) and Oberhausen Mention at the Festival of Youth Paris. The film was also shown in several schools by invitation. The film was directed by John Krish, written by Krish and Michael Gilmour, and produced by James Ritchie. It was filmed in the vicinity of the then-closed Watton-at-Stone railway station, Hertfordshire. The bridge that the boy at the beginning / end of the film is sitting on is the southern side of the Station Rd railway bridge. The main filming area for the actors was located immediately southwest of the bridge sandwiched between Church Lane and the railway line. The "stone throwing" 'competition' was filmed immediately north of the railway bridge on the western side embankment where the AWS signal ramp is. The "Great Tunnel Walk" scene was filmed about 3.5 Miles (5.63 km) south of the current Watton-at-Stone railway station. The 'start' was at the northern portal and 'finish' was at the southern one.
Document 15: Blind (2011 film): Blind () is a 2011 South Korean crime thriller film directed by Ahn Sang-hoon with screenplay by Choi Min-seok which won the "Hit By Pitch" project fair held by the Korean Movie Producers Guild in 2009. It stars Kim Ha-neul and Yoo Seung-ho. Kim received Best Actress honors at the 48th Grand Bell Awards and the 32nd Blue Dragon Film Awards for her performance.
ground_truth: Jang Hoon