The DISRPT 2021 Shared Task on Elementary Discourse Unit Segmentation, Connective Detection, and Relation Classification
Summary
DISRPT 2021 was the second edition of a shared task on the basic building blocks of discourse parsing. It aimed to make results comparable across three theoretical frameworks: RST, SDRT and PDTB. The organizers kept and updated the 2019 tracks on EDU segmentation and connective detection. They also added a new track on discourse relation classification. For that track, relations from every framework were converted into a common format of directed unit pairs (*.rels files), with surrounding sentence context and token offsets. The benchmark contains 16 datasets in 11 languages, about 3 million hand-annotated tokens in total. Segmentation and connective data come in two versions: treebanked CoNLL-U with gold UD-style parses, and plain tokens without sentence splits. All submissions were scored with the same scripts and inputs.
The best systems reached roughly the low 90s on segmentation and connective detection. Relation classification remained much harder, with scores in the low 60s. The benchmark matters because it gives researchers from different frameworks a single, uniform resource for multilingual discourse parsing.
Key points
- Data composition: 16 datasets, 11 languages, about 3M tokens.
- 13 datasets are for EDU segmentation (RST and SDRT corpora).
- 3 PDTB-style datasets are for connective detection: eng.pdtb.pdtb, tur.pdtb.tdb and zho.pdtb.cdtb.
- All 16 datasets are used for relation classification.
- Surprise dataset: the Persian RST Corpus (fas.rst.prstc) was released together with the test sets, about one month before the deadline.
- Licensing: five corpora (e.g., RST-DT, PDTB, CDTB, TDB, and part of GUM) are distributed as annotations only, with scripts to rebuild the text.
- Scoring: segmentation and connective detection use span-based F-score. Connectives count only on exact span match, with no partial credit.
- Relation classification results:
- DisCoDisCo was best on 12 datasets and averaged more than 7 points above DiscRel. It relied on language-specific contextual embeddings, with BERT-style NSP models working well.
- DiscRel, which uses stacked Random Forests over SBERT features, won on both Chinese datasets, spa.rst.sctb and Persian.
Cited by
- DiscoFlan: Instruction Fine-tuning and Refined Text Generation for Discourse Relation Label Classification
- The DISRPT 2023 Shared Task on Elementary Discourse Unit Segmentation, Connective Detection, and Relation Classification
- Bilingual Rhetorical Structure Parsing with Large Parallel Annotations
- Discourse Relation Prediction and Discourse Parsing in Dialogues with Minimal Supervision
- Why Can't Discourse Parsing Generalize? A Thorough Investigation of the Impact of Data Diversity
- What Causes the Failure of Explicit to Implicit Discourse Relation Recognition?
- GCDT: A Chinese RST Treebank for Multigenre and Multilingual Discourse Parsing
- eRST: A Signaled Graph Theory of Discourse Relations and Organization
Cite
@inproceedings{zeldes2021disrpt,
title = {{The DISRPT 2021 Shared Task on Elementary Discourse Unit Segmentation, Connective Detection, and Relation Classification}},
author = {Zeldes, Amir and Liu, Yang Janet and Iruskieta, Mikel and Muller, Philippe and Braud, Chloé and Badene, Sonia},
booktitle = {Proceedings of the 2nd Shared Task on Discourse Relation Parsing and Treebanking (DISRPT 2021)},
year = {2021},
doi = {10.18653/v1/2021.disrpt-1.1},
url = {https://doi.org/10.18653/v1/2021.disrpt-1.1}
}References
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