About

Nested named entity recognition is a subtask of information extraction that seeks to locate and classify nested named entities (i.e., hierarchically structured entities) mentioned in unstructured text (Source: Adapted from Wikipedia).

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Latest papers with code

Nested Named Entity Recognition with Partially-Observed TreeCRFs

15 Dec 2020FranxYao/Partially-Observed-TreeCRFs

With the TreeCRF we achieve a uniform way to jointly model the observed and the latent nodes.

CONSTITUENCY PARSING NESTED NAMED ENTITY RECOGNITION

22
15 Dec 2020

Pyramid: A Layered Model for Nested Named Entity Recognition

ACL 2020 LorrinWWW/Pyramid

Its hidden state at layer l represents an l-gram in the input text, which is labeled only if its corresponding text region represents a complete entity mention.

Ranked #2 on Nested Named Entity Recognition on GENIA (using extra training data)

NESTED NAMED ENTITY RECOGNITION

8
01 Jul 2020

Bipartite Flat-Graph Network for Nested Named Entity Recognition

ACL 2020 cslydia/BiFlaG

In this paper, we propose a novel bipartite flat-graph network (BiFlaG) for nested named entity recognition (NER), which contains two subgraph modules: a flat NER module for outermost entities and a graph module for all the entities located in inner layers.

NESTED MENTION RECOGNITION NESTED NAMED ENTITY RECOGNITION

32
01 May 2020

A Boundary-aware Neural Model for Nested Named Entity Recognition

IJCNLP 2019 thecharm/boundary-aware-nested-ner

We propose a boundary-aware neural model for nested NER which leverages entity boundaries to predict entity categorical labels.

NESTED NAMED ENTITY RECOGNITION

57
01 Nov 2019

A Unified MRC Framework for Named Entity Recognition

ACL 2020 ShannonAI/mrc-for-flat-nested-ner

Instead of treating the task of NER as a sequence labeling problem, we propose to formulate it as a machine reading comprehension (MRC) task.

 Ranked #1 on Named Entity Recognition on ACE 2005 (using extra training data)

CHINESE NAMED ENTITY RECOGNITION ENTITY EXTRACTION USING GAN MACHINE READING COMPREHENSION NESTED MENTION RECOGNITION NESTED NAMED ENTITY RECOGNITION

126
25 Oct 2019

Nested Named Entity Recognition via Second-best Sequence Learning and Decoding

5 Sep 2019yahshibu/nested-ner-tacl2020-transformers

When an entity name contains other names within it, the identification of all combinations of names can become difficult and expensive.

 Ranked #1 on Nested Named Entity Recognition on ACE 2004 (using extra training data)

NESTED MENTION RECOGNITION NESTED NAMED ENTITY RECOGNITION

75
05 Sep 2019

Neural Architectures for Nested NER through Linearization

ACL 2019 ufal/acl2019_nested_ner

We propose two neural network architectures for nested named entity recognition (NER), a setting in which named entities may overlap and also be labeled with more than one label.

NESTED MENTION RECOGNITION NESTED NAMED ENTITY RECOGNITION

73
19 Aug 2019