Cross-lingual Aspect-based Sentiment Analysis with Aspect Term Code-Switching

Wenxuan Zhang, Ruidan He, Haiyun Peng, Lidong Bing, Wai Lam


Abstract
Many efforts have been made in solving the Aspect-based sentiment analysis (ABSA) task. While most existing studies focus on English texts, handling ABSA in resource-poor languages remains a challenging problem. In this paper, we consider the unsupervised cross-lingual transfer for the ABSA task, where only labeled data in the source language is available and we aim at transferring its knowledge to the target language having no labeled data. To this end, we propose an alignment-free label projection method to obtain high-quality pseudo-labeled data of the target language with the help of the translation system, which could preserve more accurate task-specific knowledge in the target language. For better utilizing the source and translated data, as well as enhancing the cross-lingual alignment, we design an aspect code-switching mechanism to augment the training data with code-switched bilingual sentences. To further investigate the importance of language-specific knowledge in solving the ABSA problem, we distill the above model on the unlabeled target language data which improves the performance to the same level of the supervised method.
Anthology ID:
2021.emnlp-main.727
Volume:
Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing
Month:
November
Year:
2021
Address:
Online and Punta Cana, Dominican Republic
Venue:
EMNLP
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
9220–9230
Language:
URL:
https://aclanthology.org/2021.emnlp-main.727
DOI:
10.18653/v1/2021.emnlp-main.727
Bibkey:
Cite (ACL):
Wenxuan Zhang, Ruidan He, Haiyun Peng, Lidong Bing, and Wai Lam. 2021. Cross-lingual Aspect-based Sentiment Analysis with Aspect Term Code-Switching. In Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing, pages 9220–9230, Online and Punta Cana, Dominican Republic. Association for Computational Linguistics.
Cite (Informal):
Cross-lingual Aspect-based Sentiment Analysis with Aspect Term Code-Switching (Zhang et al., EMNLP 2021)
Copy Citation:
PDF:
https://aclanthology.org/2021.emnlp-main.727.pdf
Video:
 https://aclanthology.org/2021.emnlp-main.727.mp4
Code
 isakzhang/xabsa