Question: Sŏsŏng-guyŏk, or Sosong District, is one of the 19 guyŏk of Pyongyang,  is the capital and largest city of which country?
Sentence (from "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).
Relevant evidence: Yes