Abstract
In this paper, we conceptualize single-document extractive summarization as a tree induction problem. In contrast to previous approaches which have relied on linguistically motivated document representations to generate summaries, our model induces a multi-root dependency tree while predicting the output summary. Each root node in the tree is a summary sentence, and the subtrees attached to it are sentences whose content relates to or explains the summary sentence. We design a new iterative refinement algorithm: it induces the trees through repeatedly refining the structures predicted by previous iterations. We demonstrate experimentally on two benchmark datasets that our summarizer performs competitively against state-of-the-art methods.- Anthology ID:
- N19-1173
- Volume:
- Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long and Short Papers)
- Month:
- June
- Year:
- 2019
- Address:
- Minneapolis, Minnesota
- Editors:
- Jill Burstein, Christy Doran, Thamar Solorio
- Venue:
- NAACL
- SIG:
- Publisher:
- Association for Computational Linguistics
- Note:
- Pages:
- 1745–1755
- Language:
- URL:
- https://aclanthology.org/N19-1173
- DOI:
- 10.18653/v1/N19-1173
- Cite (ACL):
- Yang Liu, Ivan Titov, and Mirella Lapata. 2019. Single Document Summarization as Tree Induction. In Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long and Short Papers), pages 1745–1755, Minneapolis, Minnesota. Association for Computational Linguistics.
- Cite (Informal):
- Single Document Summarization as Tree Induction (Liu et al., NAACL 2019)
- PDF:
- https://preview.aclanthology.org/proper-vol2-ingestion/N19-1173.pdf
- Code
- nlpyang/SUMO
- Data
- New York Times Annotated Corpus