Question: Sŏsŏng-guyŏk, or Sosong District, is one of the 19 guyŏk of Pyongyang,  is the capital and largest city of which country?

Context paragraphs:
Taedonggang-guyok: Taedonggang-guyŏk (Korean: 대동강구역 ), or Taedong River District, is one of the 19 guyŏk, and one of the six that constitute East Pyongyang, North Korea.  Taedonggang-guyŏk is on the eastern bank of the Taedong River, north of Tongdaewŏn-guyŏk and west of Sadong-guyŏk (Sadong District).  It was established in January 1958.

Sadong-guyok: Sadong-guyŏk, or Sadong District, is one of the 19 guyŏk, and one of the six, that constitute East Pyongyang, North Korea.  It is on the eastern bank of the Taedong River, and the mouth of the Nam River.  It is north of Ryŏkp'o-guyŏk (Ryokpho District), east of Taedonggang-guyŏk (Taedonggang District) and north east of Tongdaewŏn-guyŏk.  It was established in September 1959.

Ryokpo-guyok: Ryŏkp'o-guyŏk, or Ryŏkp'o District is one of the 19 guyŏk that constitute Pyongyang, North Korea.  This is where part of the Complex of Goguryeo Tombs of Pyongyang can be found.

Ryongsong-guyok: Ryongsŏng-guyŏk, or Ryongsŏng District (룡성구역) is one of the 19 guyŏk that constitute Pyongyang, North Korea.

Sunan-guyok: Sunan-guyŏk, or Sunan District is one of the 19 guyŏk that constitute Pyongyang, North Korea.

Songyo-guyok: Sŏn'gyo-guyŏk or Songyo District is one of the 19 guyŏk that constitute the city of Pyongyang, North Korea.  It is on the eastern bank of the Taedong River at the center of East Pyongyang.  It is bordered to the south by Nakrang-guyok, to the north by Tongdaewon-guyok and to the east by Ryokpo and Sadong-guyoks.  It was established in September 1959.

Moranbong-guyok: Moranbong-guyŏk, or the Moranbong District, is one of the 19 guyŏk which constitute the city of Pyongyang, North Korea.  It is located north of Chung-guyok, the city's central district, and is bordered to the north by Sosong and Taesong-guyoks, to the east by the Taedong River, and the west by the Potong River and Potonggang-guyok.  It is named after Moran Hill located in the district's west area ("Moran" is ).  It was designated a guyŏk in October 1960 by the Pyongyang City People's Committee.

Sosong-guyok: Sŏsŏng-guyŏk, or Sosong District, is one of the 19 guyŏk of Pyongyang, North Korea.  It is located on the Pot'ong River, west of the Moranbong-guyŏk (Moranbong District) and south of Hyŏngjesan-guyŏk (Hyongjesan District).  It was established January 1958.

Unjong-guyok: Ŭnjŏng-guyŏk, or Ŭnjŏng District is one of the 19 guyŏk that constitute Pyongyang, North Korea.

Pyongyang: Pyongyang ( ; (Chosŏn'gŭl: 평양 ; Hancha:  ), ] , literally: "Flat Land" or "Peaceful Land") is the capital and largest city of the Democratic People’s Republic of Korea (commonly known as North Korea).

Supporting paragraphs: Sosong-guyok Pyongyang
Answer: Democratic People’s Republic of Korea