Question: Who is the mother of Ko Young-hee's spouse?

full_context: Document 1: An Kyong-ho: He was born in Gangwon, and is a graduate of Kim Il-sung University in Pyongyang. He currently serves as the Chief Director of the Committee for the Peaceful Reunification of the Fatherland. He first entered international news in 1988, when he attended South-North preparatory talks. He was a delegate to the 9th and 11th sessions of the Supreme People's Assembly, held in 1990 and 2003.
Document 2: Hyon Chol-hae: During the Korean War, Hyon served as Kim Il-sung's bodyguard, a role which gave him "a place in North Korea's revolutionary history". He was director of the General Logistics Department of the Korean People's Army from 1986 to 1995, when he was appointed deputy director of the General Political Department, becoming one of the senior most members of the North Korean military and political leadership. He has been described as being in "close proximity" to Kim Jong-il, and as reporting directly to him. It had been suggested that, following Kim Jong-il's death, he may have taken part in a military council leadership of the country. He was transferred to director of the Standing Bureau of the National Defence Commission. He has been a member of the Central Committee of the Workers' Party of Korea since 1991.
Document 3: Kim Pyong-il: Kim Pyong-il (; born 10 August 1954) is the younger paternal half-brother of the former leader of North Korea, Kim Jong-il, and the only surviving son of former leader and president of North Korea Kim Il-sung. He is the current ambassador of North Korea to the Czech Republic.
Document 4: Ko Yong-hui: Ko Yong-hui (; 26 June 1952 – 13 August 2004), also spelled Ko Young-hee, was the North Korean supreme leader Kim Jong-il's consort and the mother of North Korea's current leader, Kim Jong-un. Within North Korea she is only referred to by titles, such as "The Respected Mother who is the Most Faithful and Loyal 'Subject' to the Dear Leader Comrade Supreme Commander", "The Mother of Pyongyang", and "The Mother of Great Songun Korea."
Document 5: 2008 Summer Olympics torch relay: North Korea: The event was held in Pyongyang on April 28. It was the first time that the Olympic torch has traveled to North Korea. A crowd of thousands waving pink paper flowers and small flags with the Beijing Olympics logo were organized by the authoritarian regime watched the beginning of the relay in Pyongyang, some waving Chinese flags. The event was presided over by the head of the country's parliament, Kim Yong Nam. The North, an ally of China, has been critical of disruptions to the torch relay elsewhere and has supported Beijing in its actions against protests in Tibet. Kim passed the torch to the first runner Pak Du Ik, who played on North Korea's 1966 World Cup soccer team, as he began the 19-kilometre route through Pyongyang. The relay began from the large sculpted flame of the obelisk of the Juche Tower, which commemorates the national ideology of Juche, or "self-reliance", created by the country's late founding President Kim Il Sung, father of leader Kim Jong Il, who did not attend.
Document 6: Kim Jong-chul: Kim Jong-chul (born 25 September 1981), sometimes spelled Kim Jong Chol, is a son of former North Korean Supreme Leader Kim Jong-il. His younger brother is Kim Jong-un, now the leader of North Korea. His older half-brother was Kim Jong-nam, who was assassinated in February 2017.
Document 7: Communism in Korea: Alexandra Kim, a Korean who lived in Russia, is sometimes credited as the first Korean communist. She had joined the Bolsheviks in 1916. In 1917, Vladimir Lenin sent her to Siberia to mobilize Koreans there against the counter-revolutionary forces and the Allied Expeditionary Forces. In Khabarovsk Kim was in charge of external affairs at the Far - Eastern Department of the Party. There she met with Yi Dong - Wi, Kim Rip and other Korean independence fighters. Together they founded the Korean People's Socialist Party, the first Korean communist party on June 28, 1918.
Document 8: Kim Jong-un: Scarce information on Kim Jong - un's early life comes from North Korean defectors and people who have claimed to witness him abroad, such as during his school attendance in Switzerland. Some of the information has been conflicting and contradictory, perhaps confusing him with his brother, Kim Jong - chul, who also attended school in Switzerland around the same time. Nevertheless, there has been some consensus on information about his early life. North Korean authorities have stated that his birthdate is 8 January 1982, but South Korean intelligence officials believe the actual date is a year later. Former basketball star Dennis Rodman said that the birthdate is 8 January 1983 after meeting Kim in September 2013 in North Korea. Kim Jong - Un was the second of three children Ko Yong - hui bore to Kim Jong - il; his elder brother Kim Jong - chul was born in 1981, while his younger sister, Kim Yo - jong, is believed to have been born in 1987.
Document 9: Premier of North Korea: The Premier of the Cabinet (Chosŏn'gŭl: 총리; Hancha: 總理; MR: Chongni) is nominally the non-executive head of government of North Korea. The office is also alternatively known as Prime Minister of North Korea. The current premier is Pak Pong - ju.
Document 10: Kim Jong-nam: Kim Jong-nam was born 10 May 1971 in Pyongyang, North Korea, to Song Hye-rim, one of three women known to have had children with Kim Jong-il. Because Kim Jong-il aimed to keep his affair with Song a secret due to the disapproval of his father Kim Il-sung, he initially kept Jong-nam out of school, instead sending him to live with Song's older sister Song Hye-rang, who tutored him at home. North Korea Leadership Watch says he left North Korea to visit his grandmother in Moscow, Soviet Union, and spent his childhood at international schools in both Russia and Switzerland until returning to his home country in 1988.
Document 11: Kim Jong-il: Soviet records show that Kim was born Yuri Irsenovich Kim () in 1941 in the village of Vyatskoye, near Khabarovsk, where his father, Kim Il-sung, commanded the 1st Battalion of the Soviet 88th Brigade, made up of Chinese and Korean exiles. Kim Jong-il's mother, Kim Jong-suk, was Kim Il-sung's first wife. Inside his family, he was nicknamed "Yura", while his younger brother Kim Man-il (born Alexander Irsenovich Kim) was nicknamed "Shura".
Document 12: Chinese characters: After Kim Jong Il, the second ruler of North Korea, died in December 2011, Kim Jong Un stepped up and began mandating the use of Hanja as a source of definition for the Korean language. Currently, it is said that North Korea teaches around 3,000 Hanja characters to North Korean students, and in some cases, the characters appear within advertisements and newspapers. However, it is also said that the authorities implore students not to use the characters in public. Due to North Korea's strict isolationism, accurate reports about hanja use in North Korea are hard to obtain.
Document 13: In Jin Moon: In Jin Moon is the former president of the Unification Church of the United States and a daughter of Unification Church founder Reverend Sun Myung Moon and his wife Hak Ja Han. Moon was born in South Korea in 1965 and moved with her family to the United States in 1973. She studied political science and philosophy at Columbia University and pursued her graduate studies at Harvard Divinity School. In the 1980s, Moon spoke at public rallies in support of her father who was convicted of tax fraud by the United States government.
Document 14: Paek Son-haeng: Paek Son-haeng (1848 November – 1933) was a Korean businesswoman known for her philanthropy. The name "Son Haeng" means virtuous deeds, and was a nickname bestowed on her due to her contributions. North Korean sources claim that she was born in modern-day Chung-kuyŏk, Pyongyang, but South Korean sources claim that she was born in Suwon. She was widowed at the age of 16 or 20, and spent the rest of her life saving money while spending very little. Regardless of her place of birth, she spent most of her life in Pyongyang, where most of her donations were made.
Document 15: Kim Yong-ju: Kim Yong-ju was born to Kim Hyŏng-jik and Kang Pan-sŏk in Mangyongdae in 1920, 8 years after his elder brother Kim Il-sung. When Kim was 3 years old, his family moved to southern Manchuria.
ground_truth: Kim Jong-suk
sub_queries: Ko Young-hee >> spouse Answer: Kim Jong-il
Who is the mother of Kim Jong-il ? Answer: Kim Jong-suk