Question: What is the stage name for actor who co-stared the 2016 film "Train to Busan" with Jung Yu-mi and Ma Dong-seok?

full_context: Document 1: Jin Goo: Jin Goo (born July 20, 1980) is a South Korean actor. He won Best Supporting Actor at the Grand Bell Awards and Blue Dragon Film Awards for his role in Bong Joon-ho's 2009 noir thriller "Mother". He is also best known for his role in the critically and commercially successful series "Descendants of the Sun".
Document 2: Yeon Sang-ho: Yeon Sang-ho (born 1978) is a South Korean film director and screenwriter. He wrote and directed the animated films "The King of Pigs" (2011) and "The Fake" (2013), and the live-action film "Train to Busan" (2016).
Document 3: Kim Yool-ho: Kim Yool-ho (; born February 21, 1985) is a South Korean actor and model, He is best known for his role in "The Map Against the World", in which he played Prince Geumwi, and the 2016 zombie thriller apocalypse film "Train to Busan" as "man in suit 2", who helps Yong-suk (played by Kim Eui-sung).
Document 4: Train to Busan: Train to Busan () is a 2016 South Korean zombie apocalypse action thriller film directed by Yeon Sang-ho and starring Gong Yoo, Jung Yu-mi, and Ma Dong-seok. The film takes place on a train to Busan, as a zombie apocalypse suddenly breaks in the country and compromises the safety of the passengers.
Document 5: Derailed (2016 film): Derailed (), also known as No Way to Go, is a 2016 South Korean action crime film starring Ma Dong-seok and Choi Min-ho. The film was displayed at the 21st Busan International Film Festival in the "Korean Cinema Today – Panorama" section. The film was released in the cinemas in South Korea on November 30, 2016.
Document 6: Yoo Ah-in: Yoo Ah-in (born Uhm Hong-sik on October 6, 1986) is a South Korean film and television actor. He rose to fame after starring in the 2010 television series "Sungkyunkwan Scandal". Yoo Ah-in is best known for his leading roles in the coming-of-age film "Punch" (2011), melodrama "Secret Love Affair" (2014), action blockbuster "Veteran" (2015), period drama "The Throne" (2015), and the historical television series "Six Flying Dragons" (2015-2016).
Document 7: 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.
Document 8: Jung Yu-mi (actress, born 1983): Jung Yu-mi (born January 18, 1983) is a South Korean actress. Jung made her feature film debut in "Blossom Again" (2005), for which she received acting recognition. She has since starred in the critically acclaimed films "Family Ties" (2006), "Chaw" (2009), "My Dear Desperado" (2010), and the box office hits "The Crucible" (2011) and "Train to Busan" (2016). She also frequently appears in films by auteur Hong Sang-soo, notably "Oki's Movie" (2010) and "Our Sunhi" (2013).
Document 9: Ma Dong-seok: Ma Dong-seok (born Lee Dong-seok on March 1, 1971), also known as Don Lee, is an American actor based in South Korea. He is best known for his supporting roles in "The Neighbor", "", "The Unjust", and "Train to Busan". He also played leading roles in "Norigae", "Murderer" and "One on One.
Document 10: Seoul Station (film): Seoul Station (Korean: 서울역 ) is a South Korean animated zombie drama film written and directed by Yeon Sang-ho. Released on August 18, 2016, the film stars Ryu Seung-ryong, Shim Eun-kyung and Lee Joon in the lead roles. The film was shown at the 2016 Edinburgh International Film Festival.
Document 11: Lee Sun-kyun: Lee Sun-kyun (born March 2, 1975) is a South Korean actor. After beginning his career in musical theatre, for many years Lee was relegated to minor and supporting roles onscreen, only getting to play lead characters in one-act dramas on KBS "Drama City" and MBC "Best Theater". In one such "Best Theater" project, he worked with TV director Lee Yoon-jung on "Taereung National Village" (2005), which led to him being cast in her later series "The 1st Shop of Coffee Prince" in 2007. "Coffee Prince", along with medical drama "White Tower" brought Lee mainstream popularity, which he followed with "Pasta" (2010) and "Golden Time" (2012).
Document 12: Yoon Kyun-sang: Yoon Kyun-sang (born March 31, 1987) is a South Korean actor who drew attention with his supporting roles in the television series "Pinocchio" (2014),"Six Flying Dragons" (2015-2016) and "Doctor Crush" (2016). In 2017, he played the titular role in "".
Document 13: The 1st Shop of Coffee Prince: The 1st Shop of Coffee Prince (; also known as Coffee Prince) is a 2007 South Korean television drama, starring Yoon Eun-hye, Gong Yoo, Lee Sun-kyun, and Chae Jung-an. Based on the novel of the same name written by Lee Sun-mi, the hit series aired on MBC from July 2 to August 28, 2007 on Mondays and Tuesdays at 21:55 for 17 episodes.
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: 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.
ground_truth: Gong Yoo