Question: When did the torch arrive in Pak Nam-chol's birthplace?

full_context: Document 1: Pak Nam-chol (judoka): Pak Nam-chol (; born January 12, 1979 in Pyongyang) is a North Korean judoka, who competed in the men's extra-lightweight category. He finished fifth in the 60-kg division at the 2003 World Judo Championships in Osaka, Japan, and later represented his nation North Korea at the 2004 Summer Olympics.
Document 2: Ahn Byeong-keun: Ahn Byeong-keun (born February 23, 1962) is a retired judoka from South Korea, who represented his native country at the 1984 Summer Olympics. There he claimed the gold medal in the men's lightweight division (– 71 kg) by defeating Italy's Ezio Gamba in the final.
Document 3: Somalis: In the martial arts, Faisal Jeylani Aweys and Mohamed Deq Abdulle also took home a silver medal and fourth place, respectively, at the 2013 Open World Taekwondo Challenge Cup in Tongeren. The Somali National Olympic committee has devised a special support program to ensure continued success in future tournaments. Additionally, Mohamed Jama has won both world and European titles in K1 and Thai Boxing.
Document 4: 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 5: 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.
Document 6: 2008 Summer Olympics torch relay: Chinese officials canceled the torch relay ceremony amidst disruptions, including a Tibetan flag flown from a window in the City Hall by Green Party officials. The third torchbearer in the Paris leg, Jin Jing, who was disabled and carried the torch on a wheelchair, was assaulted several times by unidentified protestors seemingly from the pro-Tibet independent camp. In interviews, Jin Jing said that she was "tugged at, scratched" and "kicked", but that she "did not feel the pain at the time." She received praise from ethnic Chinese worldwide as "Angel in Wheelchair". The Chinese government gave the comment that "the Chinese respect France a lot" but "Paris [has slapped] its own face."
Document 7: 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 8: 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 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: 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 11: 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 12: Hassan Pakandam: Hassan Pakandam (; May 19, 1934 in Tehran – July 16, 2013 in Tehran) was a member of Iran senior national Boxing team from 1955, continuously until 1965, and a member of Tehran Taj () Boxing Club from 1950 to 1965, boxing in the 60, 63.5, and 67 kg divisions. He was a well-built, skilled, swift, and intelligent all-around boxer. His recognized punch was a powerful cross. He participated at the 1958 Asian Games, and also as team captain at the 1964 Summer Olympics, in the Lightweight division and was also selected for the Lightweight division of the Iranian national boxing team, to participate in the 1962 Asian Games.
Document 13: 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 14: 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 15: North Korea at the Olympics: North Korea (Democratic People's Republic of Korea) first participated at the Olympic Games in 1964, appearing only in the Winter Olympic Games that year. Eight years later in 1972, the nation first participated at the Summer Olympic Games. Since then, the nation has appeared in every Summer Games, except when North Korea joined the Soviet - led boycott of the 1984 Summer Olympics, and when they boycotted the 1988 Games in Seoul, South Korea.
ground_truth: April 28
sub_queries: Pak Nam-chol >> place of birth Answer: Pyongyang
When did the torch arrive in Pyongyang ? Answer: April 28