Authors:
Giacomo Frisoni
;
Paolo Italiani
;
Francesco Boschi
and
Gianluca Moro
Affiliation:
Department of Computer Science and Engineering (DISI), University of Bologna, Via dell’Università 50, I-47522 Cesena, Italy
Keyword(s):
Abstractive Document Summarization, Event Extraction, Semantic Parsing, Biomedical Text Mining, Natural Language Processing, Natural Language Understanding.
Abstract:
Combining structured knowledge and neural language models to tackle natural language processing tasks is a recent research trend that catalyzes community attention. This integration holds a lot of potential in document summarization, especially in the biomedical domain, where the jargon and the complex facts make the overarching information truly hard to interpret. In this context, graph construction via semantic parsing plays a crucial role in unambiguously capturing the most relevant parts of a document. However, current works are limited to extracting open-domain triples, failing to model real-world n-ary and nested biomedical interactions accurately. To alleviate this issue, we present EASumm, the first framework for biomedical abstractive summarization enhanced by event graph extraction (i.e., graphical representations of medical evidence learned from scientific text), relying on dual text-graph encoders. Extensive evaluations on the CDSR dataset corroborate the importance of ex
plicit event structures, with better or comparable performance than previous state-of-the-art systems. Finally, we offer some hints to guide future research in the field.
(More)