Question: When did the torch arrive in the birthplace of Han Kum-Ok?

full_context: Document 1: Joung Da-woon: Joung Da-woon (born April 23, 1989, Seoul) is a South Korean judoka. At the 2012 Summer Olympics she competed in the Women's 63 kg, but was defeated in the semifinals. She beat Ramila Yusubova and Yoshie Ueno before losing to Xu Lili. Because Xu reached the final Joung was entered into the repechage, where she lost her bronze medal match to Gévrise Émane.
Document 2: 2008 Summer Olympics torch relay: Kazakhstan: The first torchbearer in Almaty, where the Olympic torch arrived for the first time ever on April 2, was the President of Kazakhstan Nursultan Nazarbaev. The route ran 20 km from Medeo stadium to Astana Square. There were reports that Uighur activists were arrested and some were deported back to China.
Document 3: North Korea at the 2008 Summer Olympics: North Korea (Democratic People's Republic of Korea) competed in the 2008 Summer Olympics, held in Beijing, People's Republic of China from August 8 to August 24, 2008. The country sent 63 athletes, competing in 11 sports.
Document 4: Taekwondo at the 2008 Summer Olympics – Women's 49 kg: The women's 49 kg competition in taekwondo at the 2008 Summer Olympics in Beijing. It took place on August 20, 2008 at the Beijing Science and Technology University Gymnasium.
Document 5: Alena Filipava: Filipava made her official debut at the 2008 Summer Olympics in Beijing, where she competed for the 55 kg class in freestyle wrestling, an event which was imminently dominated by world champion Saori Yoshida from Japan. She lost the second preliminary match to Kazakhstan's Olga Smirnova, with a two-set technical score (3–2, 0–3, 2–4), and a classification score of 1–3, finishing only in thirteenth place.
Document 6: 2008 Summer Olympics torch relay: After being lit at the birthplace of the Olympic Games in Olympia, Greece on March 24, the torch traveled to the Panathinaiko Stadium in Athens, and then to Beijing, arriving on March 31. From Beijing, the torch was following a route passing through six continents. The torch has visited cities along the Silk Road, symbolizing ancient links between China and the rest of the world. The relay also included an ascent with the flame to the top of Mount Everest on the border of Nepal and Tibet, China from the Chinese side, which was closed specially for the event.
Document 7: Kang Gee-eun: Kang Gee-Eun (also "Gang Ji-Eun", ; born October 15, 1990 in Seoul) is a South Korean sport shooter. She beat World Cup champion Yang Huan of China and two-time Olympian Yukie Nakayama of Japan for the gold medal in the women's trap at the 2012 Asian Shooting Championships in Doha, Qatar, accumulating a score of 93 clay pigeons. Kang is also a member of Korea Telecom Shooting Team, and is coached and trained by Song Nam-Jun.
Document 8: Ryang Chun-hwa: Ryang Chun-hwa (; ; born 12 June 1991 in Pyongyang) is a North Korean weighlifter. She competed at the 2012 Summer Olympics in the Women's 48 kg, winning the Bronze medal. Ryang represents the April 25 Sports Team. She won the silver medal at the 2011 Summer Universiade.
Document 9: 2008 Summer Olympics torch relay: Thailand: The April 18 relay through Bangkok was the Olympic flame's first visit to Thailand. The relay covered just over 10 km, and included Bangkok's Chinatown. The torch was carried past Democracy Monument, Chitralada Palace and a number of other city landmarks. M.R. Narisa Chakrabongse, Green World Foundation (GWF) chairwoman, withdrew from the torch-running ceremony, protesting against China's actions in Tibet. Several hundred protesters were present, along with Olympic supporters. Thai authorities threatened to arrest foreign protesters and ban them from future entry into Thailand. A coalition of Thai human rights groups announced that it would organise a "small demonstration" during the relay, and several hundred people did indeed take part in protests, facing Beijing supporters. Intended torchbearer Mom Rajawongse Narissara Chakrabongse boycotted the relay, to protest against China's actions in Tibet. In Bangkok, students told the media that the Chinese Embassy provided them with transportation and gave them shirts to wear.
Document 10: Han Kum-ok: Han Kum-ok (born 22 September 1987 in Pyongyang) is a North Korean freestyle wrestler. She competed in the freestyle 55 kg event at the 2012 Summer Olympics and was eliminated in the 1/8 finals by Jackeline Rentería.
Document 11: 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 12: 2018 Winter Olympics torch relay: The 2018 Winter Olympics torch relay began 24 October 2017 and ended on 9 February 2018, in advance of the 2018 Winter Olympics. After being lit in Olympia, Greece, the torch traveled to Athens on 31 October. The torch began its Korean journey on 1 November, visiting all Regions of Korea. The Korean leg began in Incheon: the torch travelled across the country for 101 days. 7,500 relay runners participated in the torch relay over a distance of 2,017 km. The torchbearers each carried the flame for 200 metres. The relay ended in Pyeongchang's Olympic Stadium, the main venue of the 2018 Olympics. The final torch was lit by figure skater Yuna Kim.
Document 13: Rim Ju-song: At the time when he was selected, he was living in Beijing. By the time North Korea received clearance to compete in London, it was "too late to qualify for most events, but swimming was an exception". Thus North Korea's representative would have to be a swimmer. Rim, who did not know how to swim, began to learn the crawl stroke in April 2012, reportedly with great difficulty at first, and the breaststroke in May.
Document 14: Ri Sang-sim: Ri Sang-sim (; born October 10, 1979 in Pyongyang) is a North Korean judoka who competed in the women's half-lightweight category. She finished fifth in the 52-kg division at the 2003 World Judo Championships in Osaka, Japan, and also represented her nation North Korea at the 2004 Summer Olympics.
Document 15: 2008 Summer Olympics torch relay: In many cities along the North American and European route, the torch relay was protested by advocates of Tibetan independence, animal rights, and legal online gambling, and people protesting against China's human rights record, resulting in confrontations at a few of the relay locations. These protests, which ranged from hundreds of people in San Francisco, to effectively none in Pyongyang, forced the path of the torch relay to be changed or shortened on a number of occasions. The torch was extinguished by Chinese security officials several times during the Paris leg for security reasons, and once in protest in Paris.
ground_truth: April 28
sub_queries: Han Kum-Ok >> place of birth Answer: Pyongyang
When did the torch arrive in Pyongyang ? Answer: April 28