TY - JOUR AU - Dai, Dai AU - Xiao, Xinyan AU - Lyu, Yajuan AU - Dou, Shan AU - She, Qiaoqiao AU - Wang, Haifeng PY - 2019/07/17 Y2 - 2024/03/28 TI - Joint Extraction of Entities and Overlapping Relations Using Position-Attentive Sequence Labeling JF - Proceedings of the AAAI Conference on Artificial Intelligence JA - AAAI VL - 33 IS - 01 SE - AAAI Technical Track: Natural Language Processing DO - 10.1609/aaai.v33i01.33016300 UR - https://ojs.aaai.org/index.php/AAAI/article/view/4591 SP - 6300-6308 AB - <p>Joint entity and relation extraction is to detect entity and relation using a single model. In this paper, we present a novel unified joint extraction model which directly tags entity and relation labels according to a query word position <em>p</em>, i.e., detecting entity at <em>p</em>, and identifying entities at other positions that have relationship with the former. To this end, we first design a tagging scheme to generate <em>n</em> tag sequences for an <em>n</em>-word sentence. Then a position-attention mechanism is introduced to produce different sentence representations for every query position to model these <em>n</em> tag sequences. In this way, our method can simultaneously extract all entities and their type, as well as all overlapping relations. Experiment results show that our framework performances significantly better on extracting overlapping relations as well as detecting long-range relation, and thus we achieve state-of-the-art performance on two public datasets.</p> ER -