Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Capital Cities and Tombs of the Ancient Koguryo Kingdom' has mentioned 'North Korea' in the following places:
Occurrence Sentence Text Source
North Korea initially attempted to register the world heritage of the sites from around 2000.
[8] Although it was scheduled to be registered in 2003, China opposed the sole registration of North Korea and applied for registration of the Goguryeo ruins scattered in Jilin Province.
For this reason, the remains of North Korea and the People's Republic of China were registered in the form of simultaneous registration in 2004.
It is recognized that there is an existence of a question on the history of Goguryeo between North Korea and China.