Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Megalithic Jar Sites in Xiengkhuang – Plain of Jars' has mentioned 'Southeast Asia' in the following places:
Occurrence Sentence Text Source
[2] The Plain of Jars is one of the most important prehistoric sites in Southeast Asia.
The Plain of Jars is located at an historical crossroads between two major cultural systems of Iron Age southeast Asia xe2x80x93 the Mun-Mekong system and the Red River/Gulf of Tonkin system.