Constituency Parsing

Constituency parsing aims to extract a constituency-based parse tree from a sentence that represents its syntactic structure according to a phrase structure grammar.

Example:

             Sentence (S)
                 |
   +-------------+------------+
   |                          |
 Noun (N)                Verb Phrase (VP)
   |                          |
 John                 +-------+--------+
                      |                |
                    Verb (V)         Noun (N)
                      |                |
                    sees              Bill

Recent approaches convert the parse tree into a sequence following a depth-first traversal in order to be able to apply sequence-to-sequence models to it. The linearized version of the above parse tree looks as follows: (S (N) (VP V N)).

Papers

Recently Added Most Hyped Most Active Needs Verification Most Verified

Showing 21–30 of 204 papers

Title	Date	Tasks	Status	Hype
Cross-Lingual Constituency Parsing for Middle High German: A Delexicalized Approach	Aug 9, 2023	Constituency ParsingCross-Lingual Transfer	—Unverified	0
Grammar-Constrained Decoding for Structured NLP Tasks without Finetuning	May 23, 2023	Code GenerationConstituency Parsing	CodeCode Available	2
Approximating CKY with Transformers	May 3, 2023	Constituency ParsingInductive Bias	CodeCode Available	0
Cascading and Direct Approaches to Unsupervised Constituency Parsing on Spoken Sentences	Mar 15, 2023	Automatic Speech RecognitionAutomatic Speech Recognition (ASR)	CodeCode Available	0
Do Transformers Parse while Predicting the Masked Word?	Mar 14, 2023	Constituency ParsingLanguage Modeling	—Unverified	0
Re-evaluating the Need for Multimodal Signals in Unsupervised Grammar Induction	Dec 20, 2022	Constituency Parsing	—Unverified	0
Unsupervised Discontinuous Constituency Parsing with Mildly Context-Sensitive Grammars	Dec 18, 2022	Constituency Parsingparameter estimation	CodeCode Available	1
Fast Rule-Based Decoding: Revisiting Syntactic Rules in Neural Constituency Parsing	Dec 16, 2022	Constituency ParsingGPU	—Unverified	0
On Parsing as Tagging	Nov 14, 2022	Constituency Parsing	CodeCode Available	1
Joint Chinese Word Segmentation and Span-based Constituency Parsing	Nov 3, 2022	Chinese Word SegmentationConstituency Parsing	—Unverified	0

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All datasets Penn Treebank CTB5 CTB7 ATB

Benchmark Results

#	Model	Metric	Claimed	Verified	Status
1	Hashing + XLNet	F1 score	96.43	—	Unverified
2	SAPar + XLNet	F1 score	96.4	—	Unverified
3	Label Attention Layer + HPSG + XLNet	F1 score	96.38	—	Unverified
4	Attach-Juxtapose Parser + XLNet	F1 score	96.34	—	Unverified
5	Head-Driven Phrase Structure Grammar Parsing (Joint) + XLNet	F1 score	96.33	—	Unverified
6	CRF Parser + RoBERTa	F1 score	96.32	—	Unverified
7	Hashing + Bert	F1 score	96.03	—	Unverified
8	N-ary semi-markov + BERT-large	F1 score	95.92	—	Unverified
9	NFC + BERT-large	F1 score	95.92	—	Unverified
10	Head-Driven Phrase Structure Grammar Parsing (Joint) + BERT	F1 score	95.84	—	Unverified

#	Model	Metric	Claimed	Verified	Status
1	Attach-Juxtapose Parser + BERT	F1 score	93.52	—	Unverified
2	SAPar + BERT	F1 score	92.66	—	Unverified
3	N-ary semi-markov + BERT	F1 score	92.5	—	Unverified
4	Hashing + Bert	F1 score	92.33	—	Unverified
5	CRF Parser + BERT	F1 score	92.27	—	Unverified
6	Kitaev etal. 2019	F1 score	91.75	—	Unverified
7	CRF Parser	F1 score	89.8	—	Unverified
8	Zhou etal. 2019	F1 score	89.4	—	Unverified
9	Kitaev etal. 2018	F1 score	87.43	—	Unverified

#	Model	Metric	Claimed	Verified	Status
1	CRF Parser + Electra	F1 score	91.92	—	Unverified
2	CRF Parser + BERT	F1 score	91.55	—	Unverified
3	CRF Parser	F1 score	88.6	—	Unverified

#	Model	Metric	Claimed	Verified	Status
1	SAPar	F1	83.26	—	Unverified