Question: Kim Jong Un opened the Rungra People's Pleasure Ground with his wife, who was born when?

Context paragraphs:
Chonji Lubricant Factory: The Ch'ŏnji Lubricant Factory, located in Hanggu-guyŏk, Namp'o, North Korea, is a factory producing various lubricating oils and greases and transformer oils.  On 5 August 2014 Kim Jong Un visited the factory, proclaiming the factory's products to be "as good as the imported ones".  The factory is served by a railway connection to Sinnamp'o Station on the P'yŏngnam Line of the Korean State Railway.

United Nations in Armenia: Established after the Second World War the United Nations is an international organization promoting peace from 1945.  Among 193 member states there is Armenia that was admitted to the UN on March 2, 1992.  Since December, 1992 when UN opened its first office in Yerevan, Armenia signed and ratified many international treaties.  There are fifteen specialized agencies, programs and funds in the UN Country Team under the supervision of the UN Resident Coordinator.  Besides, the World Bank (WB), International Finance Corporation (IFC) and International Monetary Fund (IMF) have offices in the country.

Idora Park: Idora Park was a 17.5 acre Victorian era trolley park in north Oakland, California constructed in 1904 on the site of an informal park setting called Ayala Park on the north banks of Temescal Creek.  Idora Park was leased by the Ingersoll Pleasure and Amusement Park Company that ran several eastern pleasure parks.  What began as a pleasure ground in a rural setting for Sunday picnics evolved over time into the finest amusement park in the part of the San Francisco Bay Area.  Popularity of the park declined after the advent of the automobile, and in 1929, Idora Park was razed.

Hoeryong: Hoeryŏng (] ) is a city in North Hamgyŏng Province, North Korea.  It is located opposite Jilin Province, China, with the Tumen River in between.  Sanhe (三合鎮), in Longjing City, is the closest Chinese town across the river.  Hoeryŏng is claimed to be the birthplace of Kim Il Sung's first wife and Kim Jong Il's mother, Kim Jong Suk.  It was known as "Kainei" during Japanese rule.

Original masters of taekwondo: Original Masters of TaeKwonDo is a group of twelve South Korean martial art masters assembled by the Korea Taekwondo Association (KTA) in the early 1960s to promote the newly established art of taekwondo.  In alphabetical order following Korean naming conventions, they are: Choi Chang Keun, Choi Kwang Jo, Han Cha Kyo, Kim Jong Chan, Kim Kwang Il, Kong Young Il, Park Jong Soo, Park Jung Tae, Park Sun Jae, Rhee Chong Chul, Rhee Chong Hyup, and Rhee Ki Ha.

North Korean parliamentary election, 1998: Parliamentary elections were held in North Korea on 26 July 1998.  687 deputies were elected to the tenth Supreme People's Assembly.  There was only one nominated candidate per constituency - 687 candidates for 687 seats.  According to the state news agency KCNA, the turnout rate was 99.85%, and 100% of participating voters cast their ballots in favour of the registered candidates.  Kim Jong-il was unanimously elected in constituency n°666.  According to a "Rodong Sinmun" editorial, this proved "how deep the Korean people's trust in Kim Jong Il is and how powerful and solid the monolithic unity of the people around him in one thought and purpose and with moral obligation is."

Ri Sol-ju: Ri Sol-ju or Lee Seol-ju (Hangul: 리설주 ; Hanja: 李雪主 ; RR: "Ri Seol-ju "; MR: "Ri Sŏlju " ) (born 1985–89) is the First Lady of North Korea and the wife of Korean leader Kim Jong-un.  North Korean state media has officially identified her as "his wife, Comrade Ri Sol-ju".

Rungra People's Pleasure Ground: The Rungna People's Pleasure Ground is an amusement park located in Pyongyang, North Korea.  It was opened in 2012 in a ceremony with Kim Jong Un and his wife Ri Sol-ju.  It has a dolphinarium, swimming pool, and a mini golf course.

Crystal Palace Park: Crystal Palace Park is a Victorian pleasure ground, used for cultural and sporting events.  It is located in the south-east London suburb of Crystal Palace, which was in turn named after the Crystal Palace Exhibition building, which had been moved from Hyde Park, London after the 1851 Great Exhibition and rebuilt with some modifications and enlargements to form the centrepiece of the pleasure ground, before being destroyed by fire in 1936.  The park features full-scale models of dinosaurs in a landscape, a maze, lakes, and a concert bowl.

Red Flag Mangyongdae Revolutionary School: Red Flag Mangyongdae Revolutionary School is an elite school in Mangyongdae district, Pyongyang, North Korea.  Established in 1947, it is a special education school with access only to the children of war dead, Party, military, administrative and high-ranking officials’ families.  Originally, the school was called the Magyongdae School for the Bereaved Children of Revolutionaries, which was to "receive children of fallen revolutionaries" and "educate their children and train them into fine revolutionaries after the independence of Korea.  It was located at Kan-ri, Daedong, South Pyongan.  After the formal establishment of North Korea it was moved to Pyongyang and there the first statue of Kim Il-sung was erected, according to North Korean authorities, at the suggestion of Kim Jong Suk, Kim Il Sung's wife.

Supporting paragraphs: Rungra People's Pleasure Ground Ri Sol-ju
Answer: born 1985–89