BFClass: A Backdoor-free Text Classification Framework Zichao Li author Dheeraj Mekala author Chengyu Dong author Jingbo Shang author 2021-11 text Findings of the Association for Computational Linguistics: EMNLP 2021 Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Punta Cana, Dominican Republic conference publication li-etal-2021-bfclass-backdoor 10.18653/v1/2021.findings-emnlp.40 https://aclanthology.org/2021.findings-emnlp.40/ 2021-11 444 453