paragraph_text: Na Young-seok majored in Public Administration at Yonsei University. In 2001, he joined KBS and began his career as an assistant director in the network's variety department, then was promoted to producer/director.

paragraph_text: The subsequent Korean War, which lasted from 1950 to 1953, ended with a stalemate and has left the two Koreas separated by the Korean Demilitarized Zone (DMZ) up to the present day.

paragraph_text: Oh Dae-keun (born May 11, 1982) is a South Korean field hockey player. At the 2012 Summer Olympics, he competed for the national team in the men's tournament.

paragraph_text: "Rechtop in de wind" ("Upright in the wind") was the Dutch entry in the Eurovision Song Contest 1987, performed in Dutch by Marcha, accompanied on stage by Marjolein Keuning, Yolanda Smit, Guus Westdorp, Cees Stolk and Paul Klooté.

paragraph_text: Niko Čeko (born 13 February 1969 in Split) is a retired Croatian footballer who is last played for Hajduk Split.

paragraph_text: Ninja in the Dragon's Den () is a 1982 Hong Kong martial arts film written, choreographed and directed by Corey Yuen in his feature film directorial debut, and starring Conan Lee, Hiroyuki Sanada and Hwang Jang Lee.

paragraph_text: Noh Haeng-Seok (; born 17 November 1988) is a South Korean footballer who plays as a defender for Busan IPark in the K League Classic. He joined Gwangju in 2011. He joined Busan IPark at the start of the 2015 season.

paragraph_text: Hwang Seok-keun (born September 3, 1960) is a Korean football Forward who played for South Korea in the 1980 Asian Cup. He also played for Korea University.

paragraph_text: Hrvoje Sunara (born 4 August 1979 in Split) is a Croatian footballer who plays as a goalkeeper, currently with RNK Split in the Croatian Prva HNL.

paragraph_text: The M-1978 Koksan is a 170 mm self-propelled gun of North Korean design and manufacture. Very little information is available due to the secretive nature of the North Korean government. The designations "M-1978" and "Koksan" were given to the type by American military analysts, as they first became aware of it in that year in Koksan, North Korea.

paragraph_text: Mladen Bajić (born 28 December 1950 in Split) is the former State Attorney General () of the Republic of Croatia.

paragraph_text: Hwang Jong-Hyun (born 20 May 1975) is a field hockey player from South Korea, who was a member of the Men's National Team that won the silver medal at the 2000 Summer Olympics in Sydney. In the final the Asians were beaten by title holders, the Netherlands, after penalty strokes. He is nicknamed "Jonathan", and also competed at the 2004 Summer Olympics in Athens.

paragraph_text: Ahn Seok-Ho (born January 5, 1986) is a South Korean football player who since 2007 has played for Suwon Samsung Bluewings.

paragraph_text: Gwladys Patience Épangue (born August 15, 1983, in Clichy-la-Garenne, France) is a French taekwondo athlete. Representing France at the 2005 World Taekwondo Championships in Madrid, she won the silver medal in the welterweight division, losing to Hwang Kyung-Seon from South Korea in the final. At the 2007 World Taekwondo Championships in Beijing, she won a silver medal, losing to Hwang in the final again.

paragraph_text: Raša Sraka (born 10 October 1979 in Ljubljana, Slovenia) is a Slovenian judoka. She competed in the 70 kg event at the 2012 Summer Olympics. where she lost in the quarterfinals to Hwang Ye-Sul and in the repechage to Yuri Alvear.

paragraph_text: Hwang Mu-kyu (born August 19, 1982) is a South Korean football player who played for Suwon Samsung Bluewings and Gwangju Sangmu Bulsajo.

paragraph_text: Goran Šušnjara (born 29 May 1958 in Split, SFR Yugoslavia) is a Croatian former midfielder who played for Hajduk Split.

paragraph_text: Once in a Summer () is a 2006 South Korean melodrama/romance film directed by Joh Keun-shik. The film stars Lee Byung-hun and Soo Ae. It won Best Film and Best Director (for Joh) at the 15th Chunsa Film Art Awards in 2007.

paragraph_text: Yi Hwang (1501–1570) is one of the two most prominent Korean Confucian scholars of the Joseon Dynasty, the other being his younger contemporary Yi I (Yulgok). A key figure of the Neo-Confucian literati, he established the Yeongnam School and set up the Dosan Seowon, a private Confucian academy. Yi Hwang is often referred to by his pen name Toegye ("Retreating Creek"). His courtesy name was Gyeongho.

paragraph_text: Millionaires Express (), aka Shanghai Express, is a 1986 Hong Kong martial arts action western film written and directed by Sammo Hung. The film starred Hung, Yuen Biao, Rosamund Kwan, Mei-sheng Fan and Hwang Jang Lee.

Question: When did the country where Koksan is manufactured split from the country where Hwang Seok-keun was born?
Answer: 1953