Question: Ryongam Station is located in which part of the Korean Peninsula?
Context: Comb Ceramic or Pit-Comb Ware (in Europe), Jeulmun pottery or Jeulmun vessel (in Korea) is a type of pottery subjected to geometric patterns from the comb-like tool.  This type of pottery was widely distributed in the Baltic, Finland, the Volga upstream flow, south Siberia, Lake Baikal, Mongolian Plateau, Liaodong Peninsula and the Korean Peninsula.  The oldest ones have been discovered from the remains of Liao civilization - xinglongwa culture (BC 6200 - 5400 BC) -.  It appears in 4200 BC in Finland and 4000 BC in the Korean Peninsula, so the Urheimat is assumed to be Liao region and spread afterward to North Europe through Siberia and to the Korean peninsula. Cho Tae-yong is a South Korean career diplomat, serving as the Permanent Representative of the Republic of Korea to the United Nations.  Previously, he was South Korea (Republic of Korea)'s special representative for Korean Peninsula peace and security affairs.  Cho will serve as South Korea's top delegate to the six-party talks on the Korean Peninsula nuclear issue if the negotiation resumes.  He was Director General of the South Korean foreign ministry's Task Force on North Korea, and deputy head of the South Korean delegation to the six-party talks in Beijing. South Korea, officially the Republic of Korea (abbreviated ROK), is a sovereign state in East Asia, constituting the southern part of the Korean Peninsula.  Officially, its territory consists of the whole Korean Peninsula and its adjacent islands, which are largely mountainous.  South Koreans lead a distinctive urban lifestyle, as half of them live in high-rises concentrated in the Seoul Capital Area with 25 million residents.  The capital Seoul is the world's sixth leading global city with the fifth largest economy and is the seventh most sustainable city in the world. The Four Commanderies of Han (Hangul: 한사군 ; Hanja: 漢四郡 ) were the Chinese colony located in northern Korean Peninsula and part of the Liaodong Peninsula.  The commanderies were set up to control the populace in the former Gojoseon area as far south as the Han River, with a core area at Lelang near present-day P'yongyang by Emperor Wu of the Han dynasty in early 2nd century BC after his conquest of Wiman Joseon.  Though disputed by North Korean scholars, Western sources generally describe the Lelang Commandery as existing within the Korean peninsula, and extend the rule of the four commanderies as far south as the Han River (Korea).  However, South Korean scholars assumed its administrative areas to Pyongan and Hwanghae region. North Korea, officially the Democratic People's Republic of Korea (abbreviated DPRK), is a country in East Asia constituting the northern part of the Korean Peninsula. Ryong'am Station is a railway station in Ryongdŭng-rodongjagu, Kujang county, North P'yŏngan province, North Korea.  It is the terminus of the Ryong'am Branch of the Manp'o Line of the Korean State Railway. The Korean Demilitarized Zone (DMZ; Hangul: 한반도 비무장 지대 ; Hanja: 韓半島非武裝地帶 ), informally known as the 38th Parallel, is a strip of land running across the Korean Peninsula.  It is established by the provisions of the Korean Armistice Agreement to serve as a buffer zone between the Democratic People's Republic of Korea (North Korea) and the Republic of Korea (South Korea).  The Demilitarized zone (DMZ) is a border barrier that divides the Korean Peninsula roughly in half.  It was created by agreement between North Korea, China and the United Nations in 1953.  The DMZ is 250 km long, and about 4 km wide. Silla (57 BC – 935 AD) (Hangul: 신라 ; Hanja: 新羅 ; RR: "Silla " ] ) was a kingdom located in southern and central parts of the Korean Peninsula.  It was one of the Three Kingdoms of Korea, together with Baekje and Goguryeo.  Silla was also one of the world's longest sustained dynasties.  Although it was founded by King Hyeokgeose, the dynasty was ruled by the Gyeongju Kim (김, 金) clan for most of its 992-year history.  It began as a chiefdom in the Samhan confederacies, once allied with China, but Silla eventually conquered the other two kingdoms, Baekje in 660 and Goguryeo in 668.  Thereafter, Later Silla occupied most of the Korean Peninsula, while the northern part re-emerged as Balhae, a successor-state of Goguryeo.  After nearly 1000 years of rule, Silla fragmented into the brief Later Three Kingdoms of Silla, Later Baekje, and Taebong, handing over power to Goryeo in 935. Goguryeo (고구려 ; 高句麗 ; ] , 37 BCE–668 CE), also called Goryeo (고려 ; 高麗 ; ] ), was a Korean kingdom located in the northern and central parts of the Korean Peninsula and the southern and central parts of inner and outer Manchuria.  Goguryeo was an active participant in the power struggle for control of the Korean peninsula and was also associated with the foreign affairs of neighboring polities in China and Japan.  Goguryeo has been described as an empire by Korean scholars. Geostationary Ocean Color Imager (GOCI, ), is the world’s first geostationary orbit satellite image sensor in order to observe or monitor an ocean-color around the Korean Peninsula [1][2].  The spatial resolution of GOCI is about 500m and the range of target area is about 2,500km×2,500km centered on Korean Peninsula.  GOCI was loaded on Communication, Ocean, and Meteorological Satellite (COMS) of South Korea which was launched in June, 2010.  It will be operated by Korea Ocean Satellite Center (KOSC) at Korea Institute of Ocean Science & Technology (KIOST), and capture the images of ocean-color around the Korean Peninsula 8 times a day for 7.7 years.
Answer: the northern part