Multi-layer Sequence Labeling-based Joint Biomedical Event Extraction
This addresses the need for simpler and more effective biomedical event extraction tools for researchers, though it appears incremental as it builds on existing joint methods.
The paper tackled biomedical event extraction by proposing MLSL, a multi-layer sequence labeling method that simplifies the process and explicitly uses trigger word information, achieving superior performance compared to state-of-the-art methods.
In recent years, biomedical event extraction has been dominated by complicated pipeline and joint methods, which need to be simplified. In addition, existing work has not effectively utilized trigger word information explicitly. Hence, we propose MLSL, a method based on multi-layer sequence labeling for joint biomedical event extraction. MLSL does not introduce prior knowledge and complex structures. Moreover, it explicitly incorporates the information of candidate trigger words into the sequence labeling to learn the interaction relationships between trigger words and argument roles. Based on this, MLSL can learn well with just a simple workflow. Extensive experimentation demonstrates the superiority of MLSL in terms of extraction performance compared to other state-of-the-art methods.