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    <abstract>Implicit sentiment analysis, aiming at detecting the sentiment of a sentence without sentiment words, has become an attractive research topic in recent years. In this paper, we focus on event-centric implicit sentiment analysis that utilizes the sentiment-aware event contained in a sentence to infer its sentiment polarity. Most existing methods in implicit sentiment analysis simply view noun phrases or entities in text as events or indirectly model events with sophisticated models. Since events often trigger sentiments in sentences, we argue that this task would benefit from explicit modeling of events and event representation learning. To this end, we represent an event as the combination of its event type and the event triplet \ensuremath&lt;subject, predicate, object\ensuremath&gt;. Based on such event representation, we further propose a novel model with hierarchical tensor-based composition mechanism to detect sentiment in text. In addition, we present a dataset for event-centric implicit sentiment analysis where each sentence is labeled with the event representation described above. Experimental results on our constructed dataset and an existing benchmark dataset show the effectiveness of the proposed approach.</abstract>
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%0 Conference Proceedings
%T Implicit Sentiment Analysis with Event-centered Text Representation
%A Zhou, Deyu
%A Wang, Jianan
%A Zhang, Linhai
%A He, Yulan
%Y Moens, Marie-Francine
%Y Huang, Xuanjing
%Y Specia, Lucia
%Y Yih, Scott Wen-tau
%S Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing
%D 2021
%8 November
%I Association for Computational Linguistics
%C Online and Punta Cana, Dominican Republic
%F zhou-etal-2021-implicit
%X Implicit sentiment analysis, aiming at detecting the sentiment of a sentence without sentiment words, has become an attractive research topic in recent years. In this paper, we focus on event-centric implicit sentiment analysis that utilizes the sentiment-aware event contained in a sentence to infer its sentiment polarity. Most existing methods in implicit sentiment analysis simply view noun phrases or entities in text as events or indirectly model events with sophisticated models. Since events often trigger sentiments in sentences, we argue that this task would benefit from explicit modeling of events and event representation learning. To this end, we represent an event as the combination of its event type and the event triplet \ensuremath<subject, predicate, object\ensuremath>. Based on such event representation, we further propose a novel model with hierarchical tensor-based composition mechanism to detect sentiment in text. In addition, we present a dataset for event-centric implicit sentiment analysis where each sentence is labeled with the event representation described above. Experimental results on our constructed dataset and an existing benchmark dataset show the effectiveness of the proposed approach.
%R 10.18653/v1/2021.emnlp-main.551
%U https://aclanthology.org/2021.emnlp-main.551/
%U https://doi.org/10.18653/v1/2021.emnlp-main.551
%P 6884-6893

Markdown (Informal)

[Implicit Sentiment Analysis with Event-centered Text Representation](https://aclanthology.org/2021.emnlp-main.551/) (Zhou et al., EMNLP 2021)

• Implicit Sentiment Analysis with Event-centered Text Representation (Zhou et al., EMNLP 2021)

ACL

• Deyu Zhou, Jianan Wang, Linhai Zhang, and Yulan He. 2021. Implicit Sentiment Analysis with Event-centered Text Representation. In Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing, pages 6884–6893, Online and Punta Cana, Dominican Republic. Association for Computational Linguistics.