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arxiv: 2605.22963 · v1 · pith:22HI66ETnew · submitted 2026-05-21 · 💻 cs.CL · cs.AI

Graph Alignment Topology as an Inductive Bias for Grounding Detection

Pith reviewed 2026-05-25 05:52 UTC · model grok-4.3

classification 💻 cs.CL cs.AI
keywords hallucination detectiongrounding detectiongraph neural networksbipartite graphsLLM outputsmessage passingalignment topology
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The pith

Training graph neural networks on bipartite alignment graphs between references and LLM outputs detects grounding more accurately than prior methods or GPT-4o.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

Large language models optimize for plausible text rather than explicit verification that each claim follows from a source document, which produces hallucinations in high-stakes settings such as clinical support. The paper constructs aligned bipartite graphs linking reference passages to generated statements and trains a graph neural network to perform message passing directly over the alignment edges. This structure supplies an inductive bias that previous retrieval, consistency, or verification pipelines do not use. The resulting detector reaches state-of-the-art accuracy on four separate hallucination and question-answering benchmarks while surpassing GPT-4o and other strong baselines.

Core claim

Constructing aligned bipartite graphs between reference information and LLM outputs and training a graph neural network to model alignment structure using message passing produces a detector whose performance exceeds all compared methods, including GPT-4o, on four diverse hallucination and question-answering datasets.

What carries the argument

Aligned bipartite graphs between reference information and LLM outputs, modeled by graph neural network message passing over the alignment edges.

If this is right

  • The detector outperforms all compared methods including GPT-4o across the four tested datasets.
  • Alignment topology supplies an inductive bias that retrieval augmentation and self-consistency alone do not provide.
  • The same graph construction can be applied in clinical decision support where strict factual grounding is required.
  • Message passing over alignment edges directly encodes whether generated propositions are entailed by source documents.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • If the bipartite-graph construction proves robust, the same topology could be extracted from non-text modalities such as image captions or code snippets.
  • The approach could be inserted as an additional verification layer inside retrieval-augmented generation pipelines without retraining the base LLM.
  • Performance may degrade when reference documents contain internal contradictions that the current alignment procedure does not explicitly represent.

Load-bearing premise

That the alignment topology learned from the training graphs will capture grounding patterns that continue to hold for new references and new LLM outputs outside the four evaluated datasets.

What would settle it

A fifth, previously unseen hallucination or question-answering dataset on which the trained graph detector scores below GPT-4o or the strongest baseline method.

Figures

Figures reproduced from arXiv: 2605.22963 by Adam Cross, Jimeng Sun, Paul Landes, Pranav Herur.

Figure 1
Figure 1. Figure 1: Overview of CALAMRFLOW on a MEDHALLU [27] dataset example. MEDHALLU denotes the reference evidence as knowledge and provides ground truth and hallucination responses. CALAMRFLOW constructs semantic graphs from the knowledge and candidate response, aligns the resulting reference–response graphs, weights the topology with flow-derived support features, and classifies the response as supported or unsupported.… view at source ↗
Figure 2
Figure 2. Figure 2: Graph-structure intervention analysis. Rows distinguish perturbation and ablation experi [PITH_FULL_IMAGE:figures/full_fig_p009_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: Per-dataset graph-structure intervention results. Rows distinguish perturbation and ablation [PITH_FULL_IMAGE:figures/full_fig_p014_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: Aligned cosine-distance distributions across the [PITH_FULL_IMAGE:figures/full_fig_p015_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: Three-dimensional t-SNE visualization of trained third-layer [PITH_FULL_IMAGE:figures/full_fig_p016_5.png] view at source ↗
read the original abstract

Large Language Models (LLMs) are optimized to produce distributionally plausible continuations rather than to explicitly verify whether generated propositions are entailed by source documents. This inductive bias enables generalization, but it does not encode whether responses are grounded with respect to a reference. These issues limit the use of LLMs in domains where strict factual correctness is crucial, such as clinical decision support. Existing hallucination detection approaches improve factuality through retrieval augmentation, self-consistency, or claim verification, but generally do not learn directly over alignment topology. To leverage alignment topology as an inductive bias, we construct aligned bipartite graphs between reference information and LLM outputs and train a graph neural network (GNN) to model alignment structure using message passing. The method achieves state-of-the-art results on four diverse hallucination and question-answering datasets, outperforming all compared methods, including foundational LLMs such as GPT-4o.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

1 major / 0 minor

Summary. The paper proposes constructing aligned bipartite graphs between reference documents and LLM-generated outputs, then training a graph neural network (GNN) via message passing over the alignment topology to serve as an inductive bias for detecting whether LLM responses are grounded. It reports that this approach yields state-of-the-art hallucination and grounding detection performance on four diverse datasets, outperforming prior methods as well as strong baselines including GPT-4o.

Significance. If the central claim holds and the learned alignment topology generalizes, the work would introduce a distinct inductive bias—graph topology over explicit alignments—into hallucination detection, distinct from retrieval augmentation or self-consistency techniques. This could be particularly relevant for high-stakes applications such as clinical decision support where explicit grounding verification is required.

major comments (1)
  1. [Abstract] Abstract: the central claim that message passing on aligned bipartite graphs supplies a transferable inductive bias for grounding detection is load-bearing, yet the manuscript reports results exclusively on four fixed hallucination/QA datasets with no cross-dataset evaluation, held-out domain testing, or ablation of the alignment-construction heuristics. Without such evidence it remains possible that the reported gains encode dataset-specific artifacts rather than general grounding structure.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for the detailed and constructive review. The central concern regarding the generalizability of the alignment topology inductive bias is well-taken. We address it point-by-point below and commit to revisions that directly strengthen the evidence for transferability.

read point-by-point responses
  1. Referee: [Abstract] Abstract: the central claim that message passing on aligned bipartite graphs supplies a transferable inductive bias for grounding detection is load-bearing, yet the manuscript reports results exclusively on four fixed hallucination/QA datasets with no cross-dataset evaluation, held-out domain testing, or ablation of the alignment-construction heuristics. Without such evidence it remains possible that the reported gains encode dataset-specific artifacts rather than general grounding structure.

    Authors: We agree that the absence of cross-dataset transfer experiments, held-out domain testing, and ablations on the alignment heuristics leaves the transferability claim under-supported in the current version. The four datasets are drawn from distinct hallucination and QA settings, but this does not substitute for explicit cross-evaluation. In the revision we will add: (1) cross-dataset experiments training on three datasets and testing on the held-out fourth, (2) domain-shift tests using an additional out-of-distribution corpus, and (3) systematic ablations that vary the alignment-construction rules (e.g., threshold, matching strategy) while keeping the GNN fixed. These results will be reported with the same metrics and baselines to isolate the contribution of the topology bias. revision: yes

Circularity Check

0 steps flagged

No circularity; empirical GNN method with dataset-specific results

full rationale

The paper describes an empirical procedure: construct aligned bipartite graphs from reference and LLM output, then train a GNN via message passing to model alignment topology. Central claims consist of SOTA empirical results on four specific hallucination/QA datasets. No equations, fitted parameters renamed as predictions, self-citation load-bearing uniqueness theorems, or ansatz smuggling appear in the provided text. The derivation chain is self-contained as a standard supervised graph learning pipeline whose performance is measured externally on held-out test sets rather than reduced to its own inputs by construction.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Abstract-only review supplies no explicit free parameters, axioms, or invented entities; the ledger is therefore empty.

pith-pipeline@v0.9.0 · 5685 in / 1058 out tokens · 23062 ms · 2026-05-25T05:52:55.401725+00:00 · methodology

discussion (0)

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Reference graph

Works this paper leans on

38 extracted references · 38 canonical work pages · 4 internal anchors

  1. [1]

    What’s in a Summary? Laying the Groundwork for Advances in Hospital-Course Summarization

    Griffin Adams, Emily Alsentzer, Mert Ketenci, Jason Zucker, and Noémie Elhadad. What’s in a Summary? Laying the Groundwork for Advances in Hospital-Course Summarization. In Proceedings of the 2021 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, pages 4794–4811, June 2021. doi: 10.1865...

  2. [2]

    Abstract Meaning Representation for Sembanking

    Laura Banarescu, Claire Bonial, Shu Cai, Madalina Georgescu, Kira Griffitt, Ulf Hermjakob, Kevin Knight, Philipp Koehn, Martha Palmer, and Nathan Schneider. Abstract Meaning Representation for Sembanking. InProceedings of the 7th Linguistic Annotation Workshop and Interoperability with Discourse, pages 178–186, Sofia, Bulgaria, August 2013. Association fo...

  3. [3]

    XL-AMR: Enabling Cross-Lingual AMR Parsing with Transfer Learning Techniques

    Rexhina Blloshmi, Rocco Tripodi, and Roberto Navigli. XL-AMR: Enabling Cross-Lingual AMR Parsing with Transfer Learning Techniques. InProceedings of the 2020 Conference on Em- pirical Methods in Natural Language Processing (EMNLP), pages 2487–2500, Online, Novem- ber 2020. Association for Computational Linguistics. doi: 10.18653/v1/2020.emnlp-main.195. UR...

  4. [4]

    Large-scale Simple Question Answering with Memory Networks

    Antoine Bordes, Nicolas Usunier, Sumit Chopra, and Jason Weston. Large-scale Simple Question Answering with Memory Networks.arXiv:1506.02075 [cs], June 2015. URL http://arxiv.org/abs/1506.02075

  5. [5]

    Tom Brown, Benjamin Mann, Nick Ryder, Melanie Subbiah, Jared D. Kaplan, Prafulla Dhariwal, Arvind Neelakantan, Pranav Shyam, Girish Sastry, Amanda Askell, Sandhini Agarwal, Ariel Herbert-V oss, Gretchen Krueger, Tom Henighan, Rewon Child, Aditya Ramesh, Daniel Ziegler, Jeffrey Wu, Clemens Winter, Chris Hesse, Mark Chen, Eric Sigler, Mateusz Litwin, Scott ...

  6. [6]

    Liu, Richard Peng, Maximilian Probst Gutenberg, and Sushant Sachdeva

    Li Chen, Rasmus Kyng, Yang P. Liu, Richard Peng, Maximilian Probst Gutenberg, and Sushant Sachdeva. Maximum Flow and Minimum-Cost Flow in Almost-Linear Time. In2022 IEEE 63rd Annual Symposium on F oundations of Computer Science (FOCS), pages 612–623, October 2022. doi: 10.1109/FOCS54457.2022.00064. URL https://ieeexplore.ieee.org/document/ 9996881

  7. [7]

    Princeton University Press

    Lester Randolph Ford and Delbert Ray Fulkerson. Flows in networks. InFlows in Net- works, Princeton Landmarks in Mathematics and Physics, page 212. Princeton University Press, 1962. ISBN 978-0-691-65184-2. URL https://press.princeton.edu/books/ hardcover/9780691651842/flows-in-networks

  8. [8]

    Schoenholz, Patrick F

    Justin Gilmer, Samuel S. Schoenholz, Patrick F. Riley, Oriol Vinyals, and George E. Dahl. Neural Message Passing for Quantum Chemistry. InProceedings of the 34th International Conference on Machine Learning, pages 1263–1272. PMLR, July 2017. URL https:// proceedings.mlr.press/v70/gilmer17a.html

  9. [9]

    The Curious Case of Neural Text Degeneration

    Ari Holtzman, Jan Buys, Li Du, Maxwell Forbes, and Yejin Choi. The Curious Case of Neural Text Degeneration. InInternational Conference on Learning Representations, 2020. URL https://openreview.net/forum?id=rygGQyrFvH

  10. [10]

    Knowledge-Centric Hallucination Detection

    Xiangkun Hu, Dongyu Ru, Lin Qiu, Qipeng Guo, Tianhang Zhang, Yang Xu, Yun Luo, Pengfei Liu, Yue Zhang, and Zheng Zhang. Knowledge-Centric Hallucination Detection. In Yaser Al-Onaizan, Mohit Bansal, and Yun-Nung Chen, editors,Proceedings of the 2024 Conference on Empirical Methods in Natural Language Processing, pages 6953–6975, Miami, Florida, USA, Novemb...

  11. [11]

    RefChecker: Reference-based Fine-grained Hallucination Checker and Benchmark for Large Language Models, May 2024

    Xiangkun Hu, Dongyu Ru, Lin Qiu, Qipeng Guo, Tianhang Zhang, Yang Xu, Yun Luo, Pengfei Liu, Yue Zhang, and Zheng Zhang. RefChecker: Reference-based Fine-grained Hallucination Checker and Benchmark for Large Language Models, May 2024. URL http: //arxiv.org/abs/2405.14486

  12. [12]

    Yifan Li, Yifan Du, Kun Zhou, Jinpeng Wang, Xin Zhao, and Ji-Rong Wen

    Ziwei Ji, Tiezheng Yu, Yan Xu, Nayeon Lee, Etsuko Ishii, and Pascale Fung. Towards Mitigating LLM Hallucination via Self Reflection. In Houda Bouamor, Juan Pino, and Kalika Bali, editors, Findings of the Association for Computational Linguistics: EMNLP 2023, pages 1827–1843, Singapore, December 2023. Association for Computational Linguistics. doi: 10.1865...

  13. [13]

    PubMedQA: A Dataset for Biomedical Research Question Answering

    Qiao Jin, Bhuwan Dhingra, Zhengping Liu, William Cohen, and Xinghua Lu. PubMedQA: A Dataset for Biomedical Research Question Answering. In Kentaro Inui, Jing Jiang, Vin- cent Ng, and Xiaojun Wan, editors,Proceedings of the 2019 Conference on Empirical Meth- ods in Natural Language Processing and the 9th International Joint Conference on Natural Language P...

  14. [14]

    From TreeBank to PropBank

    Paul Kingsbury and Martha Palmer. From TreeBank to PropBank. InProceedings of the Third International Conference on Language Resources and Evaluation (LREC’02), Las Palmas, Canary Islands - Spain, May 2002. European Language Resources Association (ELRA). URL http://www.lrec-conf.org/proceedings/lrec2002/pdf/283.pdf

  15. [15]

    Semi-Supervised Classification with Graph Convolutional Networks

    Thomas N. Kipf and Max Welling. Semi-Supervised Classification with Graph Convolutional Networks. In5th International Conference on Learning Representations, ICLR 2017, Toulon, France, February 2017. OpenReview.net. doi: 10.48550/arXiv.1609.02907. URL https: //openreview.net/forum?id=SJU4ayYgl

  16. [16]

    CALAMR: Component ALignment for Abstract Meaning Representation

    Paul Landes and Barbara Di Eugenio. CALAMR: Component ALignment for Abstract Meaning Representation. InProceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation, pages 2622–2637, Torino, Italy, May 2024. ELRA and ICCL. URLhttps://aclanthology.org/2024.lrec-main.236

  17. [17]

    Chase, and Barbara Di Eugenio

    Paul Landes, Sitara Rao, Aaron J. Chase, and Barbara Di Eugenio. Toward Complete Hospital Discharge Summarization with Abstract Meaning Representation. InProceedings of the 2026 IEEE 14th International Conference on Healthcare Informatics, Minneapolis, MN, USA, June

  18. [18]

    URLhttps://zhang-informatics.github.io/ICHI2026/index.html

    IEEE. URLhttps://zhang-informatics.github.io/ICHI2026/index.html

  19. [19]

    Retrieval-augmented generation for knowledge-intensive NLP tasks

    Patrick Lewis, Ethan Perez, Aleksandra Piktus, Fabio Petroni, Vladimir Karpukhin, Na- man Goyal, Heinrich Küttler, Mike Lewis, Wen-tau Yih, Tim Rocktäschel, Sebastian Riedel, and Douwe Kiela. Retrieval-augmented generation for knowledge-intensive NLP tasks. In H. Larochelle, M. Ranzato, R. Hadsell, M.F. Balcan, and H. Lin, editors,Advances in Neural Infor...

  20. [20]

    HaluEval: A Large-Scale Hallucination Evaluation Benchmark for Large Language Models

    Junyi Li, Xiaoxue Cheng, Xin Zhao, Jian-Yun Nie, and Ji-Rong Wen. HaluEval: A Large-Scale Hallucination Evaluation Benchmark for Large Language Models. In Houda Bouamor, Juan Pino, and Kalika Bali, editors,Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing, pages 6449–6464, Singapore, December 2023. Association for Comp...

  21. [21]

    Inference-Time Intervention: Eliciting Truthful Answers from a Language Model

    Kenneth Li, Oam Patel, Fernanda Viégas, Hanspeter Pfister, and Martin Wattenberg. Inference- time intervention: Eliciting truthful answers from a language model. InAdvances in Neural Information Processing Systems, volume 36, New Orleans, Louisiana, USA, 2023. Curran Associates, Inc. doi: 10.48550/arXiv.2306.03341. URL https://arxiv.org/abs/2306. 03341

  22. [22]

    Yujia Li, Daniel Tarlow, Marc Brockschmidt, and Richard S. Zemel. Gated Graph Sequence Neural Networks. In4th International Conference on Learning Representations, Iclr ’16, 11 San Juan, Puerto Rico, May 2016. ICLR. doi: 10.48550/arXiv.1511.05493. URL https: //arxiv.org/abs/1511.05493

  23. [23]

    I Know What You Asked: Graph Path Learning using AMR for Commonsense Reasoning

    Jungwoo Lim, Dongsuk Oh, Yoonna Jang, Kisu Yang, and Heuiseok Lim. I Know What You Asked: Graph Path Learning using AMR for Commonsense Reasoning. InProceedings of the 28th International Conference on Computational Linguistics, pages 2459–2471, Barcelona, Spain (Online), December 2020. International Committee on Computational Linguistics. doi: 10. 18653/v...

  24. [24]

    ROUGE: A Package for Automatic Evaluation of Summaries

    Chin-Yew Lin. ROUGE: A Package for Automatic Evaluation of Summaries. InText Summariza- tion Branches Out, pages 74–81, Barcelona, Spain, July 2004. Association for Computational Linguistics. URLhttps://aclanthology.org/W04-1013

  25. [25]

    Decoupled Weight Decay Regularization

    Ilya Loshchilov and Frank Hutter. Decoupled Weight Decay Regularization. In7th International Conference on Learning Representations, Iclr ’19, New Orleans, LA, USA, September 2018. ICLR. URLhttps://openreview.net/forum?id=Bkg6RiCqY7

  26. [26]

    Manakul, A

    Potsawee Manakul, Adian Liusie, and Mark Gales. SelfCheckGPT: Zero-Resource Black-Box Hallucination Detection for Generative Large Language Models. In Houda Bouamor, Juan Pino, and Kalika Bali, editors,Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing, pages 9004–9017, Singapore, December 2023. Association for Computat...

  27. [27]

    A Human Evaluation of AMR-to-English Generation Systems

    Emma Manning, Shira Wein, and Nathan Schneider. A Human Evaluation of AMR-to-English Generation Systems. InProceedings of the 28th International Conference on Computational Linguistics, pages 4773–4786, Barcelona, Spain (Online), December 2020. International Committee on Computational Linguistics. doi: 10.18653/v1/2020.coling-main.420. URL https://aclanth...

  28. [28]

    MedHallu: A Comprehensive Benchmark for Detecting Medical Hallucinations in Large Language Models, February 2025

    Shrey Pandit, Jiawei Xu, Junyuan Hong, Zhangyang Wang, Tianlong Chen, Kaidi Xu, and Ying Ding. MedHallu: A Comprehensive Benchmark for Detecting Medical Hallucinations in Large Language Models, February 2025. URLhttp://arxiv.org/abs/2502.14302

  29. [29]

    HalluciNot: Hallucination Detection Through Context and Common Knowledge Verification, April 2025

    Bibek Paudel, Alexander Lyzhov, Preetam Joshi, and Puneet Anand. HalluciNot: Hallucination Detection Through Context and Common Knowledge Verification, April 2025. URL http: //arxiv.org/abs/2504.07069

  30. [30]

    Colin Raffel, Noam Shazeer, Adam Roberts, Katherine Lee, Sharan Narang, Michael Matena, Yanqi Zhou, Wei Li, and Peter J. Liu. Exploring the limits of transfer learning with a unified text-to-text transformer.The Journal of Machine Learning Research, 21(1):140:5485–140:5551, January 2020. ISSN 1532-4435. URL https://jmlr.org/papers/volume21/20-074/ 20-074.pdf

  31. [31]

    SQ u AD : 100,000+ questions for machine comprehension of text

    Pranav Rajpurkar, Jian Zhang, Konstantin Lopyrev, and Percy Liang. SQuAD: 100,000+ Questions for Machine Comprehension of Text. InProceedings of the 2016 Conference on Empirical Methods in Natural Language Processing, pages 2383–2392, Austin, Texas, November 2016. Association for Computational Linguistics. doi: 10.18653/v1/D16-1264. URL https://www.aclweb...

  32. [32]

    Sentence-BERT: Sentence Embeddings using Siamese BERT-Networks

    Nils Reimers and Iryna Gurevych. Sentence-BERT: Sentence Embeddings using Siamese BERT-Networks. InProceedings of the 2019 Conference on Empirical Methods in Nat- ural Language Processing and the 9th International Joint Conference on Natural Lan- guage Processing (EMNLP-IJCNLP), pages 3982–3992, Hong Kong, China, November

  33. [33]

    Sentence- BERT : Sentence Embeddings using S iamese BERT -Networks

    Association for Computational Linguistics. doi: 10.18653/v1/D19-1410. URL https://aclanthology.org/D19-1410

  34. [34]

    GraphEval: A knowledge graph-based LLM hallucina- tion evaluation framework

    Benjamin Sansford, David Smith, et al. GraphEval: A knowledge graph-based LLM hallucina- tion evaluation framework. InProceedings of the KDD 2024 Workshop on Knowledge-Infused Learning (KiL). ACM, 2024. 12

  35. [35]

    The graph neural network model.IEEE Transactions on Neural Networks, 20(1):61–80, 2009.doi:10.1109/TNN.2008.2005605

    Franco Scarselli, Marco Gori, Ah Chung Tsoi, Markus Hagenbuchner, and Gabriele Mon- fardini. The Graph Neural Network Model.IEEE Transactions on Neural Networks, 20 (1):61–80, January 2009. ISSN 1941-0093. doi: 10.1109/TNN.2008.2005605. URL https://ieeexplore.ieee.org/document/4700287

  36. [36]

    Towards Clinical Encounter Summarization: Learning to Compose Discharge Summaries from Prior Notes.arXiv:2104.13498 [cs], April 2021

    Han-Chin Shing, Chaitanya Shivade, Nima Pourdamghani, Philip Resnik, Douglas Oard, and Parminder Bhatia. Towards Clinical Encounter Summarization: Learning to Compose Discharge Summaries from Prior Notes.arXiv:2104.13498 [cs], April 2021. URL http: //arxiv.org/abs/2104.13498

  37. [37]

    O’Donnell, Mario Giulianelli, and Ryan Cotterell

    Taiga Someya, Anej Svete, Brian DuSell, Timothy J. O’Donnell, Mario Giulianelli, and Ryan Cotterell. Information Locality as an Inductive Bias for Neural Language Models. In Wanxiang Che, Joyce Nabende, Ekaterina Shutova, and Mohammad Taher Pilehvar, editors,Proceedings of the 63rd Annual Meeting of the Association for Computational Linguistics (V olume 1...

  38. [38]

    Manning, and Curtis Langlotz

    Yuhao Zhang, Derek Merck, Emily Tsai, Christopher D. Manning, and Curtis Langlotz. Op- timizing the Factual Correctness of a Summary: A Study of Summarizing Radiology Re- ports. InProceedings of the 58th Annual Meeting of the Association for Computational Linguistics, pages 5108–5120. Association for Computational Linguistics, July 2020. doi: 10.18653/v1/...