Dialogue Discourse Parsing as Generation: A Sequence-to-Sequence LLM-based Approach
Bibliographic record
Abstract
Discourse analysis studies the sentence organization within a document, aiming to reveal its underlying structural information.Existing works on dialogue discourse parsing mostly use encoder-only models and sophisticated decoding strategies to extract structures.Despite recent advances in Large Language Models (LLMs), applying directly these models on discourse parsing is challenging.To fully leverage the rich semantic and discourse knowledge in LLMs, we propose to transform discourse parsing into a generation task using a text-to-text paradigm.Our approach is intuitive and requires no modification of the LLM architecture.Experimental results on STAC and Molweni datasets show that a sequence-tosequence model such as T0 can perform reasonably well.Notably, our improved transitionbased sequence-to-sequence system achieves new state-of-the-art performance on Molweni.Furthermore, our systems can generate richer discourse structures such as graphs, whereas previous methods are mostly limited to trees. 1
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.008 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.003 | 0.003 |
| Open science | 0.003 | 0.003 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.012 | 0.005 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".