The analysis of the nested structure of named entities in Korea (한국어 중첩 개체명 분석을 위한 연구)

youngsook song (송영숙); Hyun Jo You (유현조); Cheong, Yu-Nam (정유남)

The analysis of the nested structure of named entities in Korea

Korean Semantics
2022, 76(), pp.66-101
Publisher : The Society Of Korean Semantics
Research Area : Humanities > Korean Language and Literature
Received : May 11, 2022
Accepted : June 13, 2022
Published : June 30, 2022

youngsook song ¹, Hyun Jo You ², Cheong, Yu-Nam ³

¹경희대학교
²서울대학교
³중앙대학교 인문콘텐츠연구소

Accredited

ABSTRACT

This paper analyzes the hierarchical structures of named entities in the NIKL Named Entity Corpus, which is annotated with 553,830 flat named entity tags. This study will be a base for developing a method to build a Korean nested named entity corpus. The flat version of named entity recognition identifies mentions as linear spans. The nested named entity approach analyzes the hierarchical internal structure of named entities which may consist of smaller component named entities. We extracted candidate mentions for the nested named entity analysis from the NIKL Named Entity Corpus and classified them into three categories: serial named entities, complex named entities, and phrases with a named entity head. These candidates were reviewed manually to be selected as the target of nested named entity analysis. Finally, we discussed the span and the internal structure of named entities and proposed principles and guidelines for the construction of the Korean nested named entity corpus

KEYWORDS

named entity, named entity recognition, nested named entity, complex named entity, information extraction, named entity annotation, named entity boundary detection, longest named entity, shortest named entity, natural language process

Citation status

* References for papers published after 2023 are currently being built.

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Korean Semantics 2023 KCI Impact Factor : 1.11