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Learning Implicit Sentiment in Aspect-based Sentiment ...

Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing, pages 246 256 November 7 11, 2021 Association for Computational Linguistics246 Learning Implicit Sentiment in Aspect-based Sentiment Analysiswith Supervised Contrastive Pre-TrainingZhengyan Li1, Yicheng Zou1, Chong Zhang1, Qi Zhang1 and Zhongyu Wei21 Shanghai Key Laboratory of Intelligent Information Processing,School of Computer Science, Fudan University, Shanghai, China2 School of Data Science, Fudan Sentiment analysis aims to iden-tify the Sentiment polarity of a specific aspectin product reviews.

words, but still convey clear human-aware sen-timent orientation, which is known as implicit sentiment. However, recent neural network-based approaches paid little attention to im-plicit sentiment entailed in the reviews. To overcome this issue, we adopt Supervised Con-trastive Pre-training on large-scale sentiment-

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