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The DDI track of TAC-2018 challenge addresses the problem of an information retrieval of drug-drug interactions on structured product labeling documents with discontinuous and overlapping entities. In this paper, we present our participation for event extraction subtask (Task 1). We used a supervised long-short-term memory (LSTM) network with conditional random fields decoding (LSTM-CRF) approach with an automatic exploring of words and characters features. Additional dependency-based information was integrated into word embeddings to allow better word representation. Our system performed with above median score.
Cardiff, J. & Akhtyamova, L. (2018) Extracting Drug-Drug Interactions with Character-Level and Dependency-Based Embeddings, Text Analysis Conference (TAC) November 13-14, 2018.