共参照関係を用いた医学生物学文書中の事象抽出

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  • Coreference Based Event Extraction on Biomedical Text

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This paper presents a new approach that exploits coreference information to extract event-argument (E-A) relations from biomedical documents. This approach has two advantages: (1) it can extract a large number of valuable E-A relations for document understanding based on the concept of salience in discourse ; (2) it enables us to identify cross-sentence E-A using transitivity involving coreference relations. We propose two coreference-based models: a pipeline based on an Support Vector Machine (SVM) classifier, and a joint Markov Logic Network (MLN). We show the effectiveness of these models on GENIA Event Corpus.

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