Question: When did the torch arrive in the administrative territorial entity that Sunan Stadium is in?

full_context: Document 1: 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 2: Kim Il-sung Square: Kim Il-sung Square is a large city square in the Central District of Pyongyang, North Korea, and is named after the country's founding leader, Kim Il-sung. The square was constructed in 1954 according to a master plan for reconstructing the capital after the destruction of the Korean War. It was opened in August 1954. The square is located on the foot of the Namsan Hill, west bank of the Taedong River, directly opposite the "Juche" Tower on the other side of the river. It is the 37th largest square in the world, having an area of about 75,000 square metres (807,293 square feet) which can accommodate a rally of more than 100,000 people. The square has a great cultural significance, as it is a common gathering place for rallies, dances and military parades and is often featured in media concerning North Korea.
Document 3: 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 4: 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 5: Kathmandu: Football and Cricket are the most popular sports among the younger generation in Nepal and there are several stadiums in the city. The sport is governed by the All Nepal Football Association (ANFA) from its headquarters in Kathmandu. The only international football stadium in the city is the Dasarath Rangasala Stadium, a multi-purpose stadium used mostly for football matches and cultural events, located in the neighborhood of Tripureshwor. It is the largest stadium in Nepal with a capacity of 25,000 spectators, built in 1956. Martyr's Memorial League is also held in this ground every year. The stadium was renovated with Chinese help before the 8th South Asian Games were held in Kathmandu and had floodlights installed. Kathmandu is home to the oldest football clubs of Nepal such as RCT, Sankata and NRT. Other prominent clubs include MMC, Machhindra FC, Tribhuwan Army Club (TAC) and MPC.
Document 6: 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 7: Vinh Stadium: Vinh Stadium is a multi-use stadium in Vinh, Vietnam. It is currently used mostly for football matches and is the home stadium of Sông Lam Nghệ An F.C.. The stadium holds 12,000 people.
Document 8: 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 9: Coronation Park (Sunyani, Ghana): Coronation Park is a multi-use stadium in Sunyani, Ghana, capable of holding 5,000 people. It is used mostly for football matches, and is the home stadium of Bofoakwa Tano, Bechem Chelsea and Brong-Ahafo United. It was expanded and modernised by the npp government in 2008 during the cup of nations in Ghana although it was not one of the venues. Chairs from the renovated Accra sports stadium was sent to the sunyani stadium to improve upon its standard. The venue is sometimes used by some of the junior national teams for friendlies. Currently it is not used by any premiership club in the country.
Document 10: Pyongyang Gymnasium: Pyongyang Gymnasium, also known as Pyongyang Indoor Stadium, is an indoor sporting arena located in Pyongyang, North Korea. The capacity of the arena is for 20,100 people and was opened in 1973. It is used to host indoor sporting events, such as basketball and volleyball, as well as concerts.
Document 11: 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 12: Kim Il-sung Stadium: Kim Il-sung Stadium is the name of a large multi-purpose stadium located in Pyongyang, the capital city of the Democratic People's Republic of Korea.
Document 13: Sunan Stadium: Sunan Stadium is a multi-purpose stadium in Pyongyang, North Korea. It is currently used mostly for football matches. The stadium holds 40,000 spectators and opened in 1991.
Document 14: Rungrado 1st of May Stadium: The Rungrado 1st of May Stadium, also known as the May Day Stadium, is a multi-purpose stadium in Pyongyang, North Korea, completed on 1 May 1989. It is the largest stadium in the world, with a total capacity of 114,000. The site occupies an area of 20.7 hectares (51 acres).
Document 15: 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.
ground_truth: April 28
sub_queries: Sunan Stadium >> located in the administrative territorial entity Answer: Pyongyang
When did the torch arrive in Pyongyang ? Answer: April 28