Nested Named Entity Recognition on ACE 2004

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Rank	Model	F1	Extra Training Data	Paper	Code	Year
1	PromptNER [RoBERTa-large]	88.72		PromptNER: Prompt Locating and Typing for Named Entity Recognition	tricktreat/promptner	2023
2	BINDER	88.7		Optimizing Bi-Encoder for Named Entity Recognition via Contrastive Learning	microsoft/binder	2022
3	Triaffine + ALBERT	88.56		Fusing Heterogeneous Factors with Triaffine Mechanism for Nested Named Entity Recognition	GanjinZero/Triaffine-nested-ner	2021
4	DiffusionNER	88.39		DiffusionNER: Boundary Diffusion for Named Entity Recognition	tricktreat/diffusionner · microsoft/CyBERTron-LM · MindSpore-scientific/code-12	2023
5	PromptNER [BERT-large]	88.16		PromptNER: Prompt Locating and Typing for Named Entity Recognition	tricktreat/promptner	2023
6	PIQN	88.14		Parallel Instance Query Network for Named Entity Recognition	tricktreat/piqn	2022
7	CNN-NER	88.03		An Embarrassingly Easy but Strong Baseline for Nested Named Entity Recognition	yhcc/cnn_nested_ner	2022
8	Baseline + BS	87.98		Boundary Smoothing for Named Entity Recognition	syuoni/eznlp	2022
9	Hashing	87.93		To be Continuous, or to be Discrete, Those are Bits of Questions	speedcell4/parserker	2024
10	W2NER	87.52		Unified Named Entity Recognition as Word-Word Relation Classification	ljynlp/w2ner	2021
11	Locate and Label	87.41		Locate and Label: A Two-stage Identifier for Nested Named Entity Recognition	tricktreat/locate-and-label	2021
12	Triaffine + BioBERT	87.40		Fusing Heterogeneous Factors with Triaffine Mechanism for Nested Named Entity Recognition	GanjinZero/Triaffine-nested-ner	2021
13	Sequence-to-Set	87.26		A Sequence-to-Set Network for Nested Named Entity Recognition	zqtan1024/sequence-to-set	2021
14	BARTNER	86.84		A Unified Generative Framework for Various NER Subtasks	yhcc/BARTNER	2021
15	PO-TreeCRFs	86.6		Nested Named Entity Recognition with Partially-Observed TreeCRFs	FranxYao/Partially-Observed-TreeCRFs	2020
16	LogSumExpDecoder	86.42		Nested Named Entity Recognition via Explicitly Excluding the Influence of the Best Path	speedcell4/nersted	2021
17	BoningKnife	86.41		BoningKnife: Joint Entity Mention Detection and Typing for Nested NER via prior Boundary Knowledge		2021
18	Second-best learning and decoding + BERT + Flair	85.82	✓	Nested Named Entity Recognition via Second-best Sequence Learning and Decoding	yahshibu/nested-ner-tacl2020-transformers · yahshibu/nested-ner-tacl2020 · yahshibu/nested-ner-tacl2020-flair	2019
19	Second-best learning and decoding + BERT	84.97	✓	Nested Named Entity Recognition via Second-best Sequence Learning and Decoding	yahshibu/nested-ner-tacl2020-transformers · yahshibu/nested-ner-tacl2020 · yahshibu/nested-ner-tacl2020-flair	2019
20	seq2seq+BERT+Flair	84.40		Neural Architectures for Nested NER through Linearization	ufal/acl2019_nested_ner	2019