Abstract
Stance detection aims to determine the stance of a text towards a given target. Different from aspect-level sentiment classification, the target may not appear in the text. While existing models have achieved great success in this task using deep neural networks, their performances still drop sharply on cases where targets are not directly mentioned in texts, even with ‘target-aware’ structures. We argue that the nonalignment between targets and potentially opinioned terms in texts causes such failure and this could be remedied with external knowledge as a bridge. To this end, we propose RelNet, which leverages multiple external knowledge bases as bridges to explicitly link potentially opinioned terms in texts to targets of interest. Experiments on the well-adopted SemEval 2016 task 6 dataset demonstrate the effectiveness of the proposed model, especially on the subset where targets do not appear in texts.
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Acknowledgements
This work was supported by the National Key R&D Program of China (Grant No. 2018YFB1005103), and the National Natural Science Foundation of China (Grant Nos. 61632011 and 61772153). We would particularly like to acknowledge Yanyue Lu, Yijian Tian, Hao Yang, and Yang Wu, for their kind help and useful discussion. Our deepest gratitude goes to the anonymous reviewers for their careful work and thoughtful suggestions that have helped improve this paper substantially.
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Zhang, X., Yuan, J., Zhao, Y., Qin, B. (2021). Knowledge Enhanced Target-Aware Stance Detection on Tweets. In: Qin, B., Jin, Z., Wang, H., Pan, J., Liu, Y., An, B. (eds) Knowledge Graph and Semantic Computing: Knowledge Graph Empowers New Infrastructure Construction. CCKS 2021. Communications in Computer and Information Science, vol 1466. Springer, Singapore. https://doi.org/10.1007/978-981-16-6471-7_13
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