Papers › Predicting Discourse Trees from Transformer-based Neural Summarizers

Predicting Discourse Trees from Transformer-based Neural Summarizers

14 Apr 2021NAACL 2021 4arXiv:2104.07058archive 2025-07-28

Wen Xiao, Patrick Huber, Giuseppe Carenini

Previous work indicates that discourse information benefits summarization. In this paper, we explore whether this synergy between discourse and summarization is bidirectional, by inferring document-level discourse trees from pre-trained neural summarizers. In particular, we generate unlabeled RST-style discourse trees from the self-attention matrices of the transformer model. Experiments across models and datasets reveal that the summarizer learns both, dependency- and constituency-style discourse information, which is typically encoded in a single head, covering long- and short-distance discourse dependencies. Overall, the experimental results suggest that the learned discourse information is general and transferable inter-domain.

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Discourse Parsing

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