Progressive Self-Training with Discriminator for Aspect Term Extraction Qianlong Wang author Zhiyuan Wen author Qin Zhao author Min Yang author Ruifeng Xu author 2021-11 text Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Online and Punta Cana, Dominican Republic conference publication wang-etal-2021-progressive 10.18653/v1/2021.emnlp-main.23 https://aclanthology.org/2021.emnlp-main.23/ 2021-11 257 268