Abstract
Medical relation extraction discovers relations between entity mentions in unstructured text, such as biomedical literature. Dependency structures have proven to be useful for this task. However, how to effectively make use of structural information from dependency forests remains a challenging research question. Existing approaches directly employing weighted graphs or variable graphs, where the graph can be viewed as a dependency forest, may not always yield optimal results. In this work, we propose a novel model, the auto-learning convolution-based graph convolutional network (AC-GCN), which learns weighted graphs using a 2D convolutional network. The convolution operation is performed over dependency forests to obtain highly informative features useful for medical relation extraction. Results obtained on three biomedical benchmarks show that our model is able to better learn the structural information of the dependency forests, providing significantly better results than those of previous approaches.
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This work was financially supported by the National Natural Science Foundation of China (No. 62072070).
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Qian, M. et al. (2021). Auto-learning Convolution-Based Graph Convolutional Network for Medical Relation Extraction. In: Lin, H., Zhang, M., Pang, L. (eds) Information Retrieval. CCIR 2021. Lecture Notes in Computer Science(), vol 13026. Springer, Cham. https://doi.org/10.1007/978-3-030-88189-4_15
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